Then best commence the marginalizing, shunning, and absorbing.
This is an issue no Christian need feel guilty about opposing. The Bible states explicitly God's view of homosexuality, and all the oogy, kumbaya talk in the world won't change the fact that it is an abomination before the Almighty. It doesn't mean we have to hate. It doesn't mean we have any right to hurt or injure homosexuals. It just means that we're under no moral obligation to accept their abhorrent behavior, nor to lend it our collective sanction.
It is a perfect wedge issue for the dialectical Left, since accepting homosexuality destroys the traditional notion of marriage and family and opposing it causes an ideological tension that can erupt into violence, which can also be used to destroy the status quo.
Marx would be proud.