I've read several reviews of Michael S. Rose's _Goodbye, Good Men_, and I don't think you can place the blame for the flaming queerness that infests US Catholic seminaries on Luther's doorstep. From Amazon.com, here's a...You misunderstand, no one claims the Catholic Church has no sinners - far from it. The difference I point out is that the Lutheran Church now teaches that two men may be joined in "Holy Matrimony" against the clear laws of God. Such heresy has never and will never be Catholic.
My understanding is that the ELCA approved gay marriage/gay ministers last August. Disheartening, but the ELCA is hardly the entirety of the "Lutheran Church," whatever that is.
As to whether the RCC wil ever approve gay marriage -- I hope not, but who knows?