Addendum.

With people who are bullies, you should never engage them on the level of the content, because what they think and do is ultimately only very loosely if at all connected to what you do, and they'll invent and distort reality to fit and justify their chosen behavior.

But, as I have always told other co-workers, if all of us were that stupid like the (husband) (Thai) restaurant owner assumed during his occasional corrections of our behavior, that restaurant would never be able to function, at all.