The Episcopal Church is NOT" the first big U.S. church" to bless same-sex marriages - the United Church of Christ accepted them many years ago. The article even mentions that fact. I really don't see how 1 million is small but 2 million is big.
Good for them. Hopefully the Catholic church will follow in their footsteps 2 or 3 popes from now.
If the Catholic Church ever redefined its sexual morality, it would lose all moral authority, because it defines itself as being infallible. Unlike Protestant denominations, the Catholic Church doesn't have the luxury of being wrong - its very existence is defined as the One True Church.
If the Rome of the future is fine with homosexuality, well I don't understand why anyone would want to join a church that had perpetrated such a monstrous fraud over its flock, and then turned around in the opposite direction. You'll never know what it might do next.