Both /r/rust [1] and the official forum [2] are reasonably regulated and I often see less informed members got warned about their use of aggressive or insulting languages, often directed to non-Rust languages. There are surely other venues with less enforcement (they still commonly observe the Rust Code of Conduct however), but at least I think the main venues and corresponding community heavily tries not to be offensive.

[1] https://www.reddit.com/r/rust/

[2] https://users.rust-lang.org/