This one makes a lot of sense to me. If your measure for whether or not a sex act is okay is whether or not God condemns it, then everything "God condemns" gets lumped together. Conservatives don't understand (or don't want to understand) that the left-wing standard for "is this sex act okay" is informed consent, so they assume that if you're okay with gay people, you also have to be okay with sexually abusing children and animals.

On the rare occasions they do understand that standard, they rail against it, as in the case of soon-to-be-dead shitbag Rush Limbaugh:

"You know what the magic word, the only thing that matters in American sexual mores today is? One thing. You can do anything — the left will promote and understand and tolerate anything — as long as there is one element. Do you know what it is? Consent.

"If there is consent on both or all three or all four, however many are involved in the sex act, it's perfectly fine. Whatever it is. But if the left ever senses and smells that there's no consent in part of the equation, then here come the rape police. But consent is the magic key to the left."