A lot of the cultural phenomena around Rust can best be explained in religious terms. It's no accident that we are sometimes referred to as the "Rust Evangelism Strike Force," and the word "zealot" is frequently used, of course largely by critics.
There's a deeper level as well. The concept of "memory safety" which is a core principle of Rust has, I believe, a lot in common with religious concepts of purity and cleanliness. Undefined behavior, by contrast, is an undesirable form of uncleanliness, emotionally similar to trayf in Jewish culture or haram in Muslim culture. Rituals include the `#[deny(unsafe_code)]` incantation, or using cargo-deny or similar tools to make sure uncleanliness hasn't crept in through dependencies.
It's not just Rust, although that's a nexus for a lot of tension and conflict around this issue. Tools for avoiding and mitigating unsafety are often given names evoking cleanliness: "Purify" and "sanitizers."