I think you have a lot of things right here, I guess you are logically working a lot of this out without much reference to research, or knowledge of modern European politics.
A massive hole in your analysis, conspicuous by its omission is the anti Russian /Eastern hysteria that the US has painted since the second world war.
Hence why I guess you draw the illogical conclusion that Eastern Europe was left to Soviet Russia as if it was a loose end, which wasn't actually agreed with Russia.
So you are missing a very big, probably very dangerous chunk of the propaganda actually going on right now.
Othrrwise you would not try to compare and equate Putin, with the Nazis, and Netanyahu, and you would not be on one hand be justifying US led /supported war in Ukraine against Russia yet be opposed to the US /supported "war" being waged on Palestine.
I assume this is because of lack of knowledge on your part rather than the much more sinister possibility that you actually support the original European Nazi's who still exist in Ukraine, descended from the same anti semitic ideology, still putting up statues and other public memorabilia in Ukraine, that Putin has claimed was and is still part of the Russian war effort in Ukraine, to eliminate, given Russia sacrificed 25 million of their own people to defeat during the second world war.
Your history lesson doesn't quite hit the mark without those details being mentioned.
I hope my response helps inform.
There never was atrocity like Netanyahu is doing in Palestein, done in Ukraine. Not even the real Nazis in Ukraine could lay claim to such an evil deed.
Hence why it kind of dilutes/ defeats our perception of the inhumanity of it, if we think we already let the Russians away with doing it.
We didn't, because it never happened. Russia never did to Ukraine what Israel is doing to Palestein, it's a ridiculous comparison.