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 this bit would heavily depend on the lib lol. I guess I can see a case where as the refugee crisis worsens more and more libs become more openly anti-refugee (scratch a liberal ect) but the ones I'm generally talking about in these threads are the "refugees are welcome" type of lib.
"weed out communists" also depends on the level of ideological commitedness probably.