Let me explain.
We're all busy, and there are lots of good causes out there, so I don't expect that everyone is going to carry a sign or staff a phone bank for marriage equality. I'm even willing to say that if there were a ballot initiative to create (rather than repeal) a marriage equality law, I'm OK with people who don't care much about the issue staying home and not voting. And I recognize that there is a principled conservative objection to the process by which marriage has been judicially redefined in Massachusetts, Iowa, and, before Proposition 8, California.
But, people: to get in your car and drive down to the community center for the express purpose of voting against marriage equality -- for this there can be no excuse. There is no objection to marriage equality that does not, in the final analysis, reduce to anti-gay animus.
Now, as to the Anglicans. There are plenty of acceptable reasons to remain or become a Roman Catholic. If you were raised a Catholic, and that's your family heritage and culture and for those reasons you stay in the church in spite of, or without really thinking much about, the whole women-can't-be-in-charge-and-gays-will-burn-for-their-sins thing, that's fine by me. If you were raised in another religion, but after a process of spiritual discernment you come to believe in Roman Catholic theology, and you join in spite of the aforementioned issues, more power to you.
But, again, people: to join a religion specifically because it forbids women clergy and condemns homosexuals -- that's not OK. And it won't do for you to hide behind the claim that you sincerely believe God forbids women priests and homosexuality. Otherwise we enter a world of complete ethical relativism, where any chauvinism imaginable may be absolved by the profession of faith in its divine origin.
Furthermore, by defecting to Catholicism, what exactly are you saying about core Protestant beliefs? Suddenly the Pope is infallible, transubstantiation and the immaculate conception are real, and justification is by works as well as faith? All those Huguenots got slaughtered, all those Belfast pubs blown up for nothing?
Perhaps we are witnessing the birth of a new Christian ecumenicalism: "Let's put aside our differences and focus on the core beliefs that unite us: men are in charge, and gays are going to Hell."