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@bsh1
The words have evolved beyond their historical roots. They have taken on more a meaning of the n-word towards those particular groups. I think that's sufficient grounds to preclude their use.
You really have to be a highly privileged white dude to believe this. Outside of liberal culture exists the minorities that don't tie self value to the words you use to describe them. This phenomenon is very unique to the West and specifically the Western left. I've noticed this BS seeping into the Australian far left from the US and I'd wish it'd just stay in the US. Convincing minorities that they need to be cuddled, babied and protected from the mean, nasty words that can be used on them is the basis of a culture of de-empowerment that creates victims out of classes and attempts to convince those classes that they are individually powerless before the systems of oppression that rule them.