from a logical point of view, i'd say that would be a good start. someone who engages in gay sex yet denies gays certain rights doesn't make sense to me. but being anti-gay marriage is stupid in the first place, in my left-wingnut opinion (and i agree that churches should have the right to not perform gay marriages, but the state shouldn't block the possibility).
whatever. you don't see any hypocracy here, whereas it's blatant to me. alternately, we could engage in the "do gays have a right to marry" debate... but i'd really rather not.