If it's any consolation, I figured that the author was using "Rust programmer" as a shorthand way to say "I know Rust best and that tends to be my point of comparison when learning other programming languages. But there's no particular loyalty there, and it's not like Rust is the only language I know. It's just the systems language that I already tend to think in".
Tribalism is sooo ... sadly now.
Please don't.