I don't really mind changing the race of a character, or the gender in the name of getting some cast diversity, but, the problem with SJWs is that they have to not only change EVERYTHING to some super-special oppressed/unrepresented denomination, but they make the characters mouthpieces for that group, and in doing so, destroy any virtue or depth or interest and create a cast of outrageous stereotypes that are bland, offensive (how ironic!) and annoying, I wouldn't want to spend all day around a guy who did nothing but recite baseball stats, same reason I don't want to hang around a person all day who wants to remind me yet again just how liberating it is to be *insert sexual flavor here*.
I've mentioned before that I don't mind the recent re-imagining of Marvel's Nick Fury as a black man, because he still ACTS like Nick Fury, the no-nonsense head of a military-intelligence organization tasked with taking out supervillains.... should.