As to sending me a revert patch - please use whatever mush you call brains. I'm Finnish. Did you think I'd be supporting Russian aggression? Apparently it's not just lack of real news, it's lack of history knowledge too."
Peska perkele right up your asses, Russian trolls.
Yes, the sanctions against Russia, as mentioned by Linus. The change also said the maintainers "can come back in the future if sufficient documentation is provided".
My guess is that the Linux Foundation must ensure that none of the people they work with are in any way associated with any organisation, person or activity on the sanctions list. And that they preemptively removed all maintainers that might risk violating the sanctions while they work with them to establish whether they might be covered by the sanctions or not.
Regardless of what you or they think of the sanctions, they are the law, and I don't think anyone wants the Linux Foundation to have to spend their money on lawyers and fines because they had a maintainer who also worked on a research project funded by a sanctioned entity. (If that is how it works, IANAL)
Phobia, by definition, is uncontrollable, irrational, and lasting fear for something. In the current geopolitics situation I'd say that it's not uncontrollable and very much not irrational. Fear, as a fellow Finn, might be a bit strong word, but it's a definetly a concern.
When I first read that I thought that the response is a bit harsh, as Russian (and Soviet Union) individuals have traditionally been a big part of open source community and their achievements on computing are pretty significant, but when you dig a bit deeper on that, a majority of Soviet era things are actually built by Ukrainians in Kyiv (obviously Ukraine as a country wasn't a thing back then).
Also, based on my very limited sight on the matter, Russians are not banned from contributing, but this is more of an statement that anyone working for the government in Russia can't be a part of kernel development team. There's of course legal reasons for that, very much including the trade bans against Russia, but also the moral part of it, which Linus seems to take a stand on.
Personally I've seen individuals at Russia to do quite amazing feats with both hardware and software, but as none of us are in a void without any external infcluence nor affect, I think that, while harsh, the "sanctions" (for a lack of better word) aren't overshooting anything, but they're instead leveling the playing field. Any Joe Anynymous could write a code which compromises the kernel as a whole, but should that Joe live in Russia, it might bring a government backed team which can hide their tracks on a quite a bit different level with their resources than any individual could ever even dream about.
So, while that decision might slow down some implementations and it might include some of the most capable of developers, the fear that one of them might corrupt the whole project isn't unreasonable and, with ongoing sanctions in place (and legal requirements that follow) the core dev team might not even have a choice on this.
In current global environment we're living in, I'd rather have a bit too careful management than one which doesn't take things seriously enough. We already have Canonical and others to break stuff way too often, we don't need malicious government to expand on that with nefarious purposes which could compromise a shit on of stuff on a very fundamental level if left unattended.