I am on your side and don't understand the fury of down votes in this section regarding this stance. I am from a shit hole of a country too and if my life long contribution to open science (hypothetically speaking) could be so completely disregarded because of something ultra shitty that my country did, I would be super sad and probably mad at the OS community for leaving me behind so quickly.

I also don't understand the benefit of doing this. Most people seem to claim it's for security reasons but that does not make sense to me. Closing doors to someone without any proof of malintent is so against open source philosophy that it is perhaps more damaging in its core. And being the kind of government Russia is (or for that matter Israel, China, USA etc etc) they will always try to gain cyber war advantage by such methods. This approach is therefore clearly unsustainable. You would only be able to give dev access to a handful of countries in the world.

It sure as hell won't scratch a dent in the Russian government's armor when all these sanctions did not. It is not going to achieve 1/1000th of what all those ambargoes, frozen accounts etc aimed and failed to achieve.

Therefore there is either missing information (external pressure to take this action) or this is simply an action based on personal judgement.