I think about the scenario where he feels threatened because he got exposed
I don't see a dad doing that . Most instances of male-male rape are the attacker wanting to embarrass or humiliate the victim (which is why its so common in prisons and boarding school). I don't see a father feeling that way towards his son
My dad is gay. I sort of knew before mom forced him to tell us because of his search history (he probably found out I'm gay that way too). It didn't matter to me at all obviously or my sister. He's married and very happy now.