So familiar. I believe many gay men are out there and don't want to be. Some never want to be and some, not at first. I didn't want to be for quite a long time, honestly. But after a wretched straight marriage (the sex was good though) years of being alone and gay porn coming back to my attention, I made the choice to have gay sex.
Anyway, cutting the chase I sincerely believe I know a guy like you have described. One who to me acts overwhelmingly homophobic and even though he may not realize it, shows it so clearly to a guy like me. I feel sure he heard at some point I was speculated to be gay, and as I can clearly see that's why he has always treated me like a terminal disease. I mean, the way he acts toward me is so evident it's not funny. On top of that, this guy has several, standout gay traits himself. He has a son who is gay too, which I'm not slighting at all. I understand the fear of homophobia, but it seems like a mature adult could rise above treating anyone the way he has treated me, being I've never been an oncoming threat to him in any way. I was even in a mentoring role to his gay son once and paid closer attention to him than anyone else to make him feel more comfortable.