I think a material difference between Iraq (v2 anyway) and Ukraine is that they can keep doing the “well Russia was the aggressor” thing indefinitely even if the reality is more complicated.
also yes obviously some libs are still stubborn about Iraq, the worst ones, but for the most part its generally agreed that the Iraq War was a bad thing.
I work with a lib who I probably won’t still be working with in about ten years time (our company has high turnover) who will absolutely be like this, and he’s in his mid-30’s. At best he’s going to agree that Ukraine was a mistake (although I doubt it) although instead will most likely still defend the decisions with Ukraine as ‘do you agree that Putin is bad?’; this guy says he’s against US empire, but any lengthy discussion with him will reveal that no he doesn’t really oppose the military decisions of the US. ‘He was no angel’ will be the prevailing argument every single time; never mind that the lives of the people in countries that get invaded or suffer intervention just get far worse. He lacks a ton of knowledge regarding the wars and interventions and receiving that knowledge does nothing to shake his unwavering faith in the goodness of the US government.