Could someone fill me in on the Rust situation?

I heard a PeerTuber I follow talk about controversy around "Rust" as a dangerous cult or something, but that she thinks people should put aside their "petty grievances" and focus more on what good the project will do for Linux. I'm out of the loop, but I think Rust is a programming language, right? Anyone know what this whole thing about a cult is? I want to be filled in on it, because it seems important.