Another theory I have which you can feel free to disagree with but I believe wholeheartedly. I think a lot of this ultra PC, SJW nonsense comes from a group where the majority of the people have had either no or very superficial relationships with minorities. Most seem to be middle-to-upper class white people who lived in very sheltered, white-washed areas all their lives.

If you grew up in a racially diverse area like I did in Grand Rapids/Detroit, and you grew up with other races your whole life, I don't think you have the same stick up your ass. Because real talk, especially among dudes, is NOT PC! Boys and men say a lot of repugnant shit when we're around each other. So many times I was the only (or one of the only) white people in a room at a given time and got comedy roasted with "small dick" white jokes I also remember responding with things that would make Donald Sterling blush. But it was all fun between guys and you bond by saying harsh jokes that you don't really mean.

So when I see these upper-class white college students talking about black people like they're poor delicate flowers that need to be protected with PC culture, I immediately know that they never had any true relationship with any black people. Black people don't need a bunch of corny white 20-somethings to protect them, they can handle themselves.