Earlier quoted context omitted.
The same way you prevent them from becoming progressice/racist trash bin worse than reddit. You let them speak and prove them idiots. It's really not hard. Unless you're constantly on the side that's losing, then it's pretty miserable. But know that even though you're losing now you can reformulated your arguments and try again because no ones going to censor you. You have all the same rights because you, like they,…
The problem, however, is that people are unresponsive to arguments. We are not reasonable, unfortunately. People aren't coming to these places to learn. They don't want to learn. I'm very curious as to how we can get out of this, because I really have a hard time understanding people and this is an enormous laboratory.
I really don't think you've thought your argument through.