As you may have gathered from last non-blank post, I did have a look for a better definition after your previous response. They all had various holes that, in my view, allowed someone who was racist to escape being classified as a bigot.

The best solution in my mind is that it has to be someone other than the speaker or poster who decides whether a statement is bigoted or not, and all the poster can do is ask themselves "Could this be seen as bigotted" and then "Do I want to post anyway?"