Question then: who decides whether someone is "rightly" upset? There is some implication there that we don't need act on every offense taken.
For instance, I don't expect others to act (i.e. should be forced to change) because something offends me.
Notes:
Don't confuse this question with me arguing that we shouldn't be empathetic.
I'm also not from the U.S. so my approach and offenses are different culturally than your own.
There was some interesting commentary in this thread about cultural appropriation and whatnot, which seems to me to be beside the point. My intent was only this: if there are other people rightly upset by something, it doesn't matter if you're not, it doesn't even matter if the majority are not, it's still valuable to have empathy for those those that are. That's all.