Somehow a lot of Russian speaking Crimeans didn’t see Russia’s annexation as an invasion....but a correction of past history where they were “ gifted’ by Krushchev to Ukraine
There has never in history been a stable State in the current borders of Ukraine, and there isn't one now.
It makes (much) more sense for Austria to be part of Germany than it makes for L'viv and Donetsk to be in the same state.