Very few people have listened when the minority raised alarms about so much "open source" development concentrated into one privately-owned closed-source service. You, and many others, have said you don't like the US government controlling this information, but people rarely seem to be interested in doing anything about it.

Nothing is stopping this person from sending email patches like they do in the Linux kernel project. No sanctions are involved in this person hosting a Git installation in Crimea that the rest of the world can access.

The problem isn't politics. The problem is that programmer culture currently conflates "access to Github" (which is a service run at the whims of an American defense contractor) with "free or open-source software" (which is a spectrum of opinions about copyright law). They are not related concepts, no matter what Github's marketing team has convinced the world.