Then they aren't my friends. If a "friendship" is that delicate, I'm better off, without.

I have extremely close friends, with whom I have deep, fundamental, disagreements.

I have absolutely no problem, telling people that they are dreaming, if they think they can extort me into taking their side.

"Support" can mean that I won't participate in destructive behavior. I often can't stop others from doing it, but I can make sure I don't get dragged into the cesspool, and be ready with towels and a power washer, when they get out.