There's no nicer way to say this but...

[kılıç_mehmet]

Way older than your wholly babble, and a small step ahead of your barbaric religious ideology.

Righteousness does not include harming socially important intsitutions, does it now?

so they could have the same legal protections Hetero couples already had.

Can't you have that without actually making this "union" of some sort a true marriage?
Civil unions seem to be a step that both parties of the debate could or should agree upon.
But to be deemed as a marriage, I think that it needs to fulfill several important tasks that are relevant to society. How will the marriage of two gays, who will not reproduce normally, and hopefully, benefit this society of yours? It doesn't even constitute a real family that one, even if there is a child, adopted or via surrogate mother.