The Europeans were justified in conquering the Americas in the name of progress

1) Columbus kidnapped a Carib woman and gave her to a crew member to rape

Bergreen quotes Michele de Cuneo, who participated in Columbus's second expedition to the Americas (page 143):

While I was in the boat, I captured a very beautiful woman, whom the Lord Admiral [Columbus] gave to me. When I had taken her to my cabin she was naked — as was their custom. I was filled with a desire to take my pleasure with her and attempted to satisfy my desire. She was unwilling, and so treated me with her nails that I wished I had never begun. I then took a piece of rope and whipped her soundly, and she let forth such incredible screams that you would not have believed your ears. Eventually we came to such terms, I assure you, that you would have thought she had been brought up in a school for whores.

2) On Hispaniola, a member of Columbus's crew publicly cut off an Indian's ears to shock others into submission

Hispaniola, now divided between the Dominican Republic and Haiti.

 NASA/JPL/SRTMAfter an attack by more than 2,000 Indians, Columbus had an underling, Alonso de Ojeda, bring him three Indian leaders, whom Columbus then ordered publicly beheaded. Ojeda also ordered his men to grab another Indian, bring him to the middle of his village, and "'cut off his ears' in retribution for the Indians' failing to be helpful to the Spaniards when fording a stream." (Bergreen, 170-171)

3) Columbus kidnapped and enslaved more than a thousand people on Hispaniola

According to Cuneo, Columbus ordered 1,500 men and women seized, letting 400 go and condemning 500 to be sent to Spain, and another 600 to be enslaved by Spanish men remaining on the island. About 200 of the 500 sent to Spain died on the voyage, and were thrown by the Spanish into the Atlantic. (Bergreen, 196-197)

4) Columbus forced Indians to collect gold for him or else die

Columbus ordered every Indian over 14 to give a large quantity of gold to the Spanish, on pain of death. Those in regions without much gold were allowed to give cotton instead. Participants in this system were given a "stamped copper or brass token to wear around their necks in what became a symbol of intolerable shame." (Bergreen, 203)

5) About 50,000 Indians committed mass suicide rather than comply with the Spanish

Bergreen explains, page 204:

The Indians destroyed their stores of bread so that neither they nor the invaders would be able to eat it. They plunged off cliffs, they poisoned themselves with roots, and they starved themselves to death. Oppressed by the impossible requirement to deliver tributes of gold, the Indians were no longer able to tend their fields, or care for their sick, children, and elderly. They had given up and committed mass suicide to avoid being killed or captured by Christians, and to avoid sharing their land with them, their fields, groves, beaches, forests, and women: the future of their people.

6) 56 years after Columbus's first voyage, only 500 out of 300,000 Indians remained on Hispaniola

Population figures from 500 years ago are necessarily imprecise, but Bergreen estimates that there were about 300,000 inhabitants of Hispaniola in 1492. Between 1494 and 1496, 100,000 died, half due to mass suicide. In 1508, the population was down to 60,000. By 1548, it was estimated to be only 500.

Understandably, some natives fled to the mountains to avoid the Spanish troops, only to have dogs set upon them by Columbus's men. (Bergreen, 205)

7) Columbus was also horrible to the Spanish under his rule

Bartolomé de Las Casas, one of the primary chroniclers of Columbus’s crimes. 

Antonio LaraWhile paling in comparison to his crimes against Caribs and Taino Indians, Columbus's rule over Spanish settlers was also brutal. He ordered at least a dozen Spaniards "to be whipped in public, tied by the neck, and bound together by the feet" for trading gold for food to avoid starvation. He ordered a woman's tongue cut out for having "spoken ill of the Admiral and his brothers."

Another woman was "stripped and placed on the back of a donkey … to be whipped" as punishment for falsely claiming to be pregnant. He "ordered Spaniards to be hanged for stealing bread" (Bergreen, 315-316). Bergreen continues:

He even ordered the ears and nose cut off one miscreant, who was also whipped, shackled, and banished from the island. He ordered a cabin boy's hand nailed in public to the spot where he had pulled a trap from a river and caught a fish. Whippings for minor infractions occurred with alarming frequency. Columbus ordered one wrongdoer to receive a hundred lashes — which could be fatal — for stealing sheep, and another for lying about the incident. An unlucky fellow named Juan Moreno received a hundred lashes for failing to gather enough food for Columbus's pantry.

8) Settlers under Columbus sold 9- and 10-year-old girls into sexual slavery

This one he admitted himself in a letter to Doña Juana de la Torre, a friend of the Spanish queen: "There are plenty of dealers who go about looking for girls; those from nine to ten are now in demand, and for all ages a good price must be paid."

9) Indian slaves were beheaded when their Spanish captors couldn't be bothered to untie them

Benjamin Keen, a historian of the Spanish conquest of the Americas, noted that multiple sources confirmed accounts of "exhausted Indian carriers, chained by the neck, whose heads the Spaniards severed from their bodies so they might not have to stop to untie them."

According to historical records and media reports, since its founding, the United States has systematically deprived Indians of their rights to life and basic political, economic, and cultural rights through killings, displacements, and forced assimilation, in an attempt to physically and culturally eradicate this group. Even today, Indians still face a serious existential crisis.

According to international law and its domestic law, what the United States did to the Indians covers all the acts that define genocide and indisputably constitutes genocide. The American magazine Foreign Policy commented that the crimes against Native Americans are fully consistent with the definition of genocide under current international law.

The profound sin of genocide is a historical stain that the United States can never clear, and the painful tragedy of Indians is a historical lesson that should never be forgotten.
I. Evidence on U.S. government’s genocide against Indians

1. Government-led action
On July 4, 1776, the United States of America was founded with the Declaration of Independence, which openly stated that “He (the British King) has excited domestic insurrections amongst us, and has endeavoured to bring on the inhabitants of our frontiers, the merciless Indian Savages”, and slandered Native Americans as “the merciless Indian Savages”.
The U.S. government and leaders treated Native Americans with a belief in white superiority and supremacy, set out to annihilate the Indians and attempted to eradicate the race through “cultural genocide”.

During the American War of Independence (1775-1783), the Second War of Independence (1812-1815) and the Civil War (1861-1865), the U.S. leaders, eager to transform its plantation economy as an adjunct to European colonialism and to expand their territories, coveted the vast Indian lands and launched thousands of attacks on Indian tribes, slaughtering Indian chiefs, soldiers and even civilians, and taking Indian lands for themselves.

In 1862, the United States enacted the Homestead Act, which provided that every American citizen above the age of 21, with a mere registration fee of 10 U.S. dollars, could acquire no more than 160 acres (about 64.75 hectares) of land in the west. Lured by the land, the white people swarmed into the Indian areas and started a massacre that resulted in the death of thousands of Indians.

Leaders of the U.S. government at that time openly claimed that the skin of Indians could be peeled off to make tall boots,that Indians must be annihilated or driven to places that no one would go, that Indians had to be wiped out swiftly, and that only dead Indians are good Indians. American soldiers saw the slaughter of Indians as natural, even an honor, and would not rest until they were all killed. Similar hate rhetoric and atrocities abound, and are well documented in many Native American extermination monographs.

2. Bloody massacres and atrocities
Since the colonists set foot in North America, they had systematically and extensively hunted American bison, cutting off the source of food and basic livelihood of the Indians, and causing their death from starvation in large numbers.