I’m not sure who Dimebag Darrell was. That said, John Lennon was not known for making fun of straight white guys, and he was shot by a lunatic who just wanted attention.
In contrast, Dave Chappell was attacked by a Transgender Woman specifically because he made jokes about the Transgender Community.
The word “theory” has different meanings when used in the physical sciences than the social sciences. The term “legal theory” is used regularly in Constitutional law, yet it cannot be tested in any objective way. In this context, a “theory” is a “system of thought”, or whatever phrase one chooses to use that means the same thing.
“Two Corinthians”.