So perhaps the best way is openness and receptive communication on all sides.

A: maybe you didn't mean it, but when you said _____, I felt it was subtle a slight to ____ or I had a bad experience with that.

B: hmm, you're right I didn't mean it. I will take that into consideration.

Bad reactions include:

A: I'm going to be silently angry at B and write snide things on social media. I will label them with loaded terms.

B: This is outrageous! What has the world come to with this politically correct BS?! Suddenly I have to think about what I say?!