Just ignore the people you disagree with. If they're not actually committing a crime, like a real crime, not just a THOUGHT CRIME, then you know, try to talk to them if you're inclined, but if you're not, just walk away.
Downvoting and censoring people for differences of opinion (or for "stupidity") is ultimately counter-productive and no matter how "well-intentioned" the censors are, it very quickly opens the door to fascism.