>>/45823/ [post is truncated, a word limit or a bug?]
> US can only do ... little in practice.

Ukraine is a hardly a central concern for US. It is just a juicy nice-to-have if it can be terminally pitted against russia and used as justification for selling economic warfare and cold war 2 to other countries, all the better if there is kin bloodshed, but they are not likely to go shoot at russians for the sake of little russians
> reminds me of China-Taiwan situation ... and the whole thing is just sabre rattling.

Indeed it is similar, in both cases we recognise a project by USA to peel geographically, ethnically, and historically kin populations and territories away from USA's designated adversaries. The main difference is that Russia and the UN recognises Ukraine as a separate (though close) country, while China and the UN see Taiwan as a (rebellious) second system within the only China. However, I don't think it is "just" sabre rattling: probably the US and allies/vassals are not going to go fight in ukraine/taiwan but they are serious war projects in the sense of cold, economic, or hybrid war. The US goal might not be winning a hot war against russia/china on their own borders, but to extend the era of global hegemony by finding ways to cripple their development