Beyond the ISS situation we should have completely cut all ties with Russia. They have killed hundreds of thousands of Ukrainians. Stolen children, assaulted women, and killed Ukrainian elderly and children. Not even digging into their internal recruitment policies, but the way they drag innocent Russian civilians into supporting their invasion is worth its own war crimes investigation.
Yes, this experiment is interesting and it's intriguing to me. But it's not "nice" when a few physicists are getting results at the expense of all the collective suffering going on right now.
I'm generally pragmatic about things, but in this situation cooperation is entirely uncalled for.
Meanwhile the US ignores joint efforts with China. They (China) have some interesting things going on right now. For an international space station, it's awful that a Chinese crew hasn't even been invited to the ISS despite allowing numerous rich folks going up for a week long vacation.
To be clear, I'm NOT supporting China. Their government is antithetical to a free society and is deeply partnered with Russia, N. Korea, and other states hostile to the EU and US.
But they are a major player in humans in space, and it's important to engage them at that level. Again, the ISS is a unique scenario.