The Ukrainian Parliament, whose membership had NOT suddenly changed, LEGALLY impeached (in effect) Yanukovych, who had trampled all over the Ukrainian constitution, thrown his opoposition in jail via kangaroo courts, etc.
Behind the scenes, the same oligarchs to which the Ukraine Parliament has always answered, are still in place.
If the Parliament had been forcibly replaced in large numbers, then the tossing of Yanukovych (who’s election was probably fraudulent anyway), would have been illegal. But, that “if” did not happen. And... the last I heard, there were still many protesters in Maydan — not so much the neo-Nazis, but the same people who made up the bulk of the mass protests, wanting an end to the corruption. (By now, I’d think there would be large scale anti-Russian protests as well. Who can blame them?)
Now it is true that it is hard to find a Ukrainian politician who is not corrupt. However, some are more tyrannical than others.
Is Yulia Tymoshenko (probably a more important voice for Ukraine today than the entire present exec. branch) a Nazi?
That said, I still find all the propaganda and internal politics “noise” and essentially irrelevant, in the larger picture. What has been shown is that the US (and apparently most of its people) are dishonorable and won’t live up to a big time Security Assurance.
Our worthlessness is the real problem, as it will lead to NO US ally trusting us, a major arms race (nuclear in several cases), and most likely an eventual regional nuclear war (if we are lucky it stays that size), as conflicts break out as others move into the vacuum we leave behind. This is MUCH more likely than Putin deciding to use nukes in virtually any scenario immediately arising from this Ukraine situation.