Homosexuality has always been with us, only that it wasn't in the limelight. It certainly didn't originate from the West.
Please don't argue that it's unnatural - ichneumonidae is a perfect example of why we shouldn't consider nature to be a moral compass. Don't argue that the people of Sodom and Gomorrah were destroyed by fire and brimstone, yet overlook that Lot wanted to offer his daughters to the mob outside his door.
Instead, view homosexuality as rare occurrence that shouldn't be demonized by the majority. If a man and a man elope, what does it have to do with me? I am more concerned by non-consensual practices, e.g. rape, child brides & honor killings. Now these are actions that are carried out against someone's will. If a man is being raped by another man, I will protest. But if a man loves another man, let them be.