> I'd like to get into the Rust programming language, use and make libraries, contribute code and resources, interact with other people in a professional manner.
So do it.
> Are people welcome in the Rust community, even when they happen to remain in the "wrong side" of a political movement?
But how would anyone know? This sounds like your own personal agenda/issue as opposed to that of the community.
No programmer opens their code editor with the underlying notion that it will eventually lead them to some political ideology battle, because that is what they want.
You probably missed the news about "protestware" open source software harming their users' computers based on their IP address locations, or software engineers being fired from their jobs, or people getting banned from online/offline social gatherings, and thousands of other examples occurred due to political motives.
> But how would anyone know?
You're asking the wrong questions. What if they know? Am I supposed to hide my entire being to avoid the "excommunication"?
Agreeing with centralized nature of crates.io makes you agreeing with Socialism-style managing. That is how I understood OP's take on leftism.
If you're going in there to spew your politics like they are, rather than focusing on coding (Rust is code, not a parliament, just so you're aware), you're just as bad.