A rust evangelist, who has a clojure job with some rust coding on the side, came to clojure community and couldn't stop mentioning Rust to me in clojure community.

I told him to stop, but he couldn't stop mentioning it. I got annoyed and snapped.

Evangelism is very annoying. Don't do this. If you don't like clojure, then get a new job that doesn't involve clojure, but don't come to clojure community and keep telling people to consider Rust or any other language.

If a clojure programmer disgruntled with a Rust job went to a rust community and kept telling people to maybe ditch Rust and consider clojure, would it not be annoying as hell?

I think your programming language is inferior to mine. You think my language is inferior to yours. No one is going to agree because it's a matter of opinion and taste.

Just let people use their languages according to their personal preferences. Let them write cobol, fortran, C, clojure, C++, Rust, Haskell, or whatever. Don't bother programmers with other languages.

Leave people alone. If you want to evangelize your language, publish contents. Don't bother people.

Evangelism is as annoying as an ugly guy stalking a beautiful princess. No means no. Respect personal boundaries.

  The Tao gave birth to machine language. Machine language gave birth to the assembler.
  
  The assembler gave birth to the compiler. Now there are ten thousand languages.
  
  Each language has its purpose, however humble. Each language expresses the Yin and Yang of software. Each language has its place within the Tao.
  
  But do not program in COBOL if you can avoid it.