I don't ask people about their politics. I just act like true things are true, e.g.: human instigated climate change, COVID, the efficiency of a single payer healthcare system, a oblate spheroid earth, and the moon landing. I'm politely understanding of the flaws in their world view, but I NEVER pretend that any of it is even up for debate. You can balance not being rude with not backing down from the objective reality you live in by showing an genuine fascination with their weird cult beliefs.
Conspiracy theories, religion, myths, and magic are all very comfortable fantasies that wither in the face of the existential dread from understanding that the universe is horrific and absolutely indifferent to your personal suffering. Being excellent to each other and maintaining faith in the potential of humanity (tempered by knowledge of our depravity) is our only hope of survival both physical, philosophical, political, and spiritual.
Ok, sorry that turned into a rant. This shit matters though, so not that sorry.