Until politicos take a true stand in defense of marriage by proposing an anti-adultery amendment to the Constitution, stop demonizing gays and lesbians when the one debasing your marriage is the individual in the mirror.
The hypocrisy and false piety of the deniers aside, the relationships of gays have no effect on heteros. Especially all the heteros who've done such a marvelous job of debasing marriage on their own all these many years.