>The bad faith interpretation is claiming that tipping is racist,

That's not a bad faith interpretation, the origins of tipping in the US are absolutely based in bigotry.

>claiming that OP knows that it is racist and supports it for that reason.

A fair point. GP certainly did not assume good faith or give the comment to which they responded the most charitable reading.

My apologies for being somewhat knee-jerk about it, but I have a really big problem with bigotry (I am absolutely not claiming that you or the poster to whom GP replied are bigoted) and believe that decent people should call attention to bigotry, especially when it's embedded in society as the tipping culture is in the US.

Bigotry is ethically wrong and harms the societies which it infests. As I mentioned, I feel strongly about that.

If I was less than charitable with your response to calling out bigotry (GP's attempt to do so was rather ham-handed), my apologies.