You hardely need a religion being manipulated by an asshole or group of assholes to find this kind of bigotry in action amongst any cultural group.
Its my opinion that homophobia completely transcends religious belief as well as politics and philosophies.
I think it all hangs together - it has got to have come from somewhere sometime, and I think that has to be religion. Religious ideas live on after the religion itself may have taken a back seat, people are just not very aware of it.