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.
They will not because they see Russia as the main reason why Trump became president instead of Clinton. "Russia kinda had a point in the invasion" will never be accepted by them. They desire the complete destruction of the Russian Federation, and when it becomes clear that the invasion is not leading to the downfall of the Russian state anytime soon, they will not only not come to see the truth but double down on their delusions. As the US and the rest of the west continues to decline, cope about Russia collapsing any day now will blend with cope about China collapsing any day now.