It's an entirely fair assessment within a framework of supremacism. "My language is the best. People who don't use it need to learn it. If they don't, they're bad programmers, maybe even bad people." It's a ugly spirit that no one is honest enough to admit to. But it's there. A few month ago, I saw a supposedly nice Rust leader calling SQLite "a terrible example of anything other than what you can accomplish when you pour enormous resources into a single C library."

The end result is that Rust's leaders either avoid interacting with other languages, or engage in flamewars. I think it's a big reason why Java, the most popular and successful memory safe language in the world, has little-to-no formal contacts with the Rust team.