@rooeytoo, I don’t know the details. He is new to our friend group and, as you may have inferred, not very open to discussing the situation.
You are right to point out that you can’t control people. It is a character flaw of mine that I haven’t had much luck at shaking.
Since game night is more my partner’s social function than mine, I talked it over with him and he agreed that all we can do is invite them both and let them make their own decisions. It leaves a bad taste in my mouth, though. I want to feel like my house is a warm and safe and comfortable place for everyone I invite into it. Instead, I think A will go on being a jerk to people and B probably won’t be back.
@Bellatrix, I wasn’t in the room at the time it happened, so it’s hard for me to gauge exactly how intentional it was. After talking to B, though, I have a pretty good idea of how hurtful the comment was to him.