I didn't say they aren't. But if you're, say, black, then it's easy to see how racist jokes might get under your skin, because depending on your situation you might have to deal with racism in more significant ways on the regular, and you don't need the reminder. Having been badly bullied as a kld, I can at least empathize with the way the little shit adds up and grates on your nerves.
Jokes about whites and males aren't referencing anything I care about though. "Men are so sensitive" yeah women say that on twitter but I don't get that shit in a job interview, it doesn't reflect an attitude that affects my life in any way. Do you see what I mean?