Taiwan isn’t really identical to Ukraine. China is nearly a magnitude larger while Russia is only about 4~5x bigger. Taiwan is also infinitely more important to the global economy and US foreign policy than Ukraine.
Ukraine doesn’t matter. Russia controlled it for the entirety of the Cold War and it never mattered. This whole thing is essentially a Ukrainian independence war starting in 2014.
I’d say the US invasion of Iraq was dramatically worse for the “rules-based international order” since US had very little reason to be in Iraq, a country halfway across the world.
Having said all that, US support of Ukraine has nothing to do with the rules based order. I re-iterate - it’s to a) pump money straight into Lockheed Martin & friends b) test out a bunch of new military tech (sort of like Spanish Civil War before WW2) and c) an attempt to make Russia bleed for every inch of territory
I wish people would take ideology out of these discussions.