How many frickin' episodes does it take to accept that someone is the son of Satan and not trying to destroy everything?
He's saved everyone how many times now? How about a little benefit of the doubt here, I think a little trust should've been earned by now...
What you don't understand about Satan is that he is a nice and helpful person 99 days out of a 100, and on the last day he burns down the village, rapes your daughter, eats your dog and drags what's left of you down to hell.
The point is, the devil always plays the long game. If he can create greater dismay by supporting you first, he'll do it.
That, and the fact that many depictions of evil people have them as enjoying the moment when they turn on the fragile constructs of love that they himself have helped erect and the pure joy of betraying those that trusted them.
Just stamping your feet and being angry all the time is not a very exciting way to spend your life.
Okay, so you've all made the logical step.
Then why the hell does everyone keep going back and forth in this damn show?
The least they could do is be consistent.