You can absolute support Russia’s anti-imperialist goals while rejecting all their other reactionary views. The same can be said for support for the anti-imperialist causes of the Palestinians, Iranians, Lebanese, Algerians etc. You don’t have to like them, you just need to acknowledge that this is a historical process that is inevitable.
Many left-wingers (most especially Trots, I find) think the question is: "Should we support a multipolar world? In fact, is the coming world going to be multipolar or just Russian/Chinese imperialism replacing American imperialism? Should we support Russia in Ukraine and/or China against Taiwan?"
But these are all pointless questions. What does it matter if you support Russia/China or oppose them? It's akin to spending your time debating "Is the hurricane coming inland good or bad?" instead of saying "Fuck, okay, there's a hurricane coming inland. What should our individual responses be? Should we start prepping? Get involved in local politics to better withstand it?" and even "How did this hurricane come about? How will existing infrastructure be affected? It's been looking pretty rickety even before the winds started up..."
I try to imagine that I'm looking back on the events of today from 100 years in the future. Doing so makes all questions of justification much less interesting than the question of "Where does this lead, and how is it fought?" It also explicitly imagines that there is a future, which is something that many people (quite reasonably) struggle with as climate change and massive wars continue to engulf us, which helps give perspective; just because things are a certain way now, doesn't mean that they'll be this way in 5, 10, 20, 50 years from now. It's almost impossible to have predicted the world of 2024 from the position of somebody in 1924 or even 1974, in the multitude of ways that it has changed.
100%. If you aren't a submarine, you are fucked. Surface navies, and most especially the American one due to its size, has been turned into a giant liability that eats money and resources for not much gain in return.
It does actually kinda force a more multipolar world arrangement because navies from now on will only be able to function where there is land nearby from which anti-air facilities can be placed and supplied to cover the navy, thus forcing countries away from offense and towards defense. If Crimea didn't exist for the Russian Navy to be docked in and protected by, most of it would have been sunk by now. Does also mean that China isn't totally fucked if it has to militarily take Taiwan and some of the island chains due to its proximity to the mainland, but it might never be able to become a global military power (which is a good thing on the whole, even if I would cheer if the Chinese navy appeared in the British Channel to liberate us)