To summarize, these are your arguments:
1. The Quran refutes the Bible while the Bible has no internal contradiction
2. We shouldn't believe a random person who contradicts eye witness testimony (that Jesus supposedly died on the cross.)
3. Christianity has to be true, as the apostles were brutally killed because they spread the truth although they could've just admit that they lied if they would have lied to stop the killing.
Let's start then:
1. The Quran refutes the Bible while the Bible has no internal contradiction
The Quran denies Christianity in two main things: 1. God is the Trinity 2. The Quran rejects the terminology of someone being the son of God
The Bible is rejected by the Quran as it is corrupted by man and therefore not God's message anymore. There are many proofs for that:
1. The Christians don't agree on how many books the Bible has. The different Christian denominations have different bibles. Why the Protestants accept 66 books, the Catholics accept 73, the Orthodox 83 and the Ethiopians 88 etc. If we don't know in the first place which Bible is the right one, how could you say that it is God's word when it's not even clear what we are talking about. In Islam, there are different sects besides of the people that follow the sunnah, e.g. the Shia or the Ahbash. But they still follow the exact same Quran with 114 verses, with the exact phrases. So at least one of many Bible versions is a false one.
2. What does it mean, when a book is corrupted: It can be altered, something can be added or removed. We have all of that. For alteration, just look at the different Bibles there are: The most popular ones in the US are the NIV and the King James Bible.
1. John 5:7-8
NIV: "7 For there are three that testify: 8 the[
a] Spirit, the water and the blood; and the three are in agreement."
KJV: "7 For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one. 8 And there are three that bear witness in earth, the Spirit, and the water, and the blood: and these three agree in one."
As you can see, it is totally diffirent. In the NIV we have the Spirit, the water and the blood that testify, while in the KJV there is in the heaven the Father, the Word and the Holy Ghost that, while the Spirit, the water and the blood testify on earth.
At least one of those two has to be altered, i.e. corrupted. Not both can be true, as they are two different meanings. You can interpret it they way you want but this is what it says, so you have to be sincere to admit alteration for this one.
Now lets look at addition:
Lets take the example of the story of a woman caught in adultery in John 8:1-11. Most biblical scholars count this as a later addition as it was rarely cited before the fourth century and not found in earlier manuscripts. An addition, a fabrication --> a corruption. I know it is one of the most popular and beloved stories in the bible, but this is not from God. This is the reason this story is not preached by most churches.
Removal:
There is a whole list of verses of the New Testament that are not added in English translations.
In conclusion the Bible is corrupted in every way possible: alteration, addition and removal therefore the Quranic critique towards the Bible regarding corruption is absolutely justified. They are indeed internal contradictions in the Bible which we can go into as well if you want but this is specifically why these contradictions arise from the fact that the Bible is corrupted.
2. We shouldn't believe a random person who contradicts eye witness testimony (that Jesus supposedly died on the cross.)
The Quran does not contradict eye witness testimony. It says: 'That they said (in boast), "We killed Jesus the son of Mary, the Messenger of Allah"; but they killed him not, nor crucified him, but so it was made to appear to them, and those who differ therein are full of doubts, with no (certain) knowledge, but only conjecture to follow, for of a surety they killed him not. Nay, Allah raised him up unto Himself; and Allah is Exalted in Power, Wise.' (4:157-158)
The Quran clearly states that it was made to appear to them that he was crucified. This is no denial of eye witness but rather its confirmation while telling that this testimony is not the reality. We believe that Jesus was raised by Allah and that he did not die and that he will return to kill the Antichrist. The Quran is basically the Final Testament, the last revelation from God, as it confirms the revelatoin Jesus received and was sent by Allah to guide the people back to the right track. God is able to send a new revelation 600 years after the last one. This is no indicator for Islam being false and Christianity the truth.
3. Christianity has to be true, as the apostles were brutally killed because they spread the truth although they could've just admit that they lied if they would have lied to stop the killing.
I suppose you refer to the twelve apostles, the disciples of Jesus. We believe that what Jesus, peace and blessings be upon him, taught is the true message of God. We believe in Jesus as righteous messenger of Allah. His teachings were the same as the Islamic teachings.
The disciples of Jesus were righteous people. They did die for the truth, to only worship one God only, not two in one, not three in one, but one true God (Mark 12:29) who you cal the Father and we Allah, the same God.
The Quran says: 'When Jesus sensed disbelief from his people, he asked, “Who will stand up with me for Allah?” The disciples replied, “We will stand up for Allah. We believe in Allah, so bear witness that we have submitted." They prayed to Allah,˺ “Our Lord! We believe in Your revelations and follow the messenger, so count us among those who bear witness.”' (3:52-53). The disciples were spreading the truth and never preaching the Trinity.
So your point is irrelevant as the apsotles died for the truth which Christians are not following today.
As you can see, your points are all wrong or irrelevant: The Quranic critique of the Bible is justified as the Bible is corrupted, the Quran does not reject eye witness testimony and the apostles died for the one true message to pray to only one God, they didn't die for the belief Christians have today, the Trinity.
The Christians today don't follow Jesus, the Muslims follow him. The Christians today follow Paul, not Jesus. They follow someone else than Jesus. Paul was no eye witness, no disciple. We can go on with this point, that Muslims are the true followers of Jesus not Christians, especially as Jesus and his disciples were Muslims themselves. They did not believe in the Trinity but in following only one God: “The most important one,” answered Jesus, “is this: ‘Hear, O Israel: The Lord our God, the Lord is one." (Mark 12:29).
Mall and I are having the same debate. Good luck!