Wow, this doesn't instill confidence in your moderation abilities. You need to show people who "disagree on the causes" the door.
Conversely, I think that heavy censorship of opposing ideas shows a lack of confidence in one's own opinion. If we can't debate effectively the merits of climate action in a community designed for it, then we need to work on our messaging
you're going to let a bunch of astroturfing people wreck your platform and it's not going to be useful to anyone. you're being naive.