I wonder that myself. But truthfully,,,I think people are just mad and their "stop" buttons are missing.
When cussing wasn't acceptable, people had a clear place to stop. When the rhetoric went overboard, people still had to stop short of physical violence, but now, bustin' a cap in some M*********er because you 'got dissed' seems to be expected. It is a common enough thing in a lot of the rap 'music' I have heard.
But then, I read somewhere that children who lack the ability to communicate will 'act out' their anger. We need better English teachers or something...