You jolly well know that laying a requirement on society that it must treat "gay marriage" the same as normal millennia-old marriage is a dilution of the meaning of the normal one as well as a violation of the rights of the persons thus forced. Should we adopt everything that American Indian tribes do? Should we adopt everything the Chinese do?
I understate vastly by saying it is a "mistake" of course. You miss subtlety. The unborn are even more sensitive to pain than the born are.