Oh, most definitely. But in the same way I have the right to tell them that, they have the right to keep believing it. Up until either of our beliefs (or in my case lack of) start to affect each other. "I can't do that, it goes against my beliefs". Cool whatever, I'm going to make fun of you for it and I expect you to respect it so long as I'm not actively trying to stop you from expressing your beliefs. "You can't do that, I don't believe in it". Nah, fuck off.

If some women with green hair want to meet up in the woods, wearing robes and acting like they're hexing Trump by dancing around the maypole I'm not going to say they can't, so long as they're not disturbing anyone. I'll still laugh at them if I come across it.