That's kinda like white people telling black people to "get over it.
Look, I get that many people still have valid reasons to be sensitive about this stuff. I understand that it hasn't really been that long since things were really bad for black Americans. Shit, until very recently we still had former segregationists serving in congress! Mind-boggling.
That said, you should always try to look at things from the perspectives of others if you want them to do the same for you. I was once banned from GAF for a couple weeks for poking fun at the word "redskin" being a racial slur. I honestly didn't know. When I cooled down and thought on it further it made sense, but at the time I just didn't understand how a prominent sports team could have a blatantly racist name. I was ignorant, yes, but not malevolent.
So that kinda pissed me off. Not to the point that it warped me into a racist lunatic, but it did make me angry... and I can totally see how repeated situations like that might turn a person jaded.
Repeated situations could easily be avoided of people make a commitment on showing a bit more empathy, I think minorities can find a bit to try to understand your plea , but dont expect too much of it when you have showed so little.