I don't know. I'm white. I feel odd calling people out. It makes me seem so holier than thou- but when someone says this,
"They're like that, you know..." (I was going to give all sorts of details, but then realized it actually doesn't matter what behavior was in question or what race we're speaking of. Clearly, it's just all the biggest bunch of crap any way you look at it.)
When it's someone you absolutely have to have a good relationship with, when the comment is not even true of the specific people in question let alone their entire race, when you're seething but she's just got the best of intentions- what do you say?