We can can care about more than one thing at a time lol. Do you also think black people should just "get over" the n word because global warming exists? Or gay people with the f slur? Do you think that women should stop complaining about sexual harassment in the workplace because global warming exists? Those are often "just words" after all. I care deeply about global warming and want to do things about it, probably more than you do, but that doesn't mean I have to be ok with words meant to insult and attack me and people like me.

Idk if this rhetoric will work with you because you probably do think those things, at least about the slurs.