Why does the gaming community contain a ton of homophobes?

If you have ever played an online game for more than 3 seconds, you have most likely read a homophobic comment by a fellow gamer. Why are the gay slurs so easily used by gamers? Why are gay slurs their go-to words for insulting another gamer? I am a relaxed gamer. I don’t comment at all unless it’s for a game that was well played. No one needs to hear hateful comments when playing a game. Is it because I understand a concept that is lost on 99% of gamers… IT’S JUST A GAME!!!