“I’ll continue to tip (overtip usually; I worked as a bartender for a lot of years) according to the level of service and attitude of the server.”
That’s fair, we each make our choice. The way that I see it, if they’re going to call me a racist due to my skin color, I’ll now play the role...
"They" may or may not be among those who do so. Among those who do, attitude usually gives them away. You'll get "The Look"; the one that says "I'd kick your @$$ or kill you if I thought I could get away with it". I've been fortunate enough in my lifetime to have only gotten a few of those.