Homophobia is, put simply, not just an opinion, and not something that we can casually agree or disagree with. The only thing required for evil to triumph, yadda yadda - moderates need not apply on this issue. And all of those assuming, for no good reason, that the player who wanted his character to be gay had some kind of hidden agenda... well, your bigotry is showing.
You don't have to "See both sides" of an issue when one side is clearly and utterly wrong, wrong, wrong.
...Leads to the dark side?