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 think it's gonna be more like how cons dealt with Iraq. They eventually will just say it was bad strategy, we should have just started WW3 essentially. They will not examine it to understand that is what they are saying, but it will be a tragic failure of NATO not being strong or something like that.