Why do people make the ignorant assumption that two men can't raise a child because...they're two men?

No, they ARE morally bent and corrupt. If they weren't, they wouldn't be gay. I am sorry, but your friends more than likely have the warped view that being gay is ok when it is not. Any two gay people will raise a child with that attitude, and therefore have failed to raise a child right. Now, not every straight couple should have children, but they are starting a leg up over any gay couple trying to raise a child.