I'm not very involved in the community, and I have little experience with the language, but my impression with the rust community so far has been very positive. It's one of the few places I've been where unproductive conversation is moderated gently but firmly. The only squashing of opinions I've seen has generally been for pretty trolling or very rude (from beyond normal bluntness) behavior. Maybe I've not seen the same things as you but my experience has been overwhelmingly positive.