In my experience, its usually some kind of personal experience where they decided to generalize their whole race. And then use this to get acceptance from whites.
There's plenty of times in my life where you had ignorant ass mufukkas come to parties to start shooting the shyt up, idiots ruining the theater with their bullshyt and other fukked up shyt. But people of all races do ignorant shyt, so you can't generalize.
Just because some ignorant ass chick did some bullshyt to me won't make me generalize all black women cause others wanted to wash my dirty drawls from simply being the exact same person. Same thing cause one stupid fukk tried to test me on the corner is not gonna make me generalize all black men. Cause there are just as much, if not more black men just like me who just trying to live life and stay outta trouble.