Your brain is full of Biden's. Better take the opinions of a professor to clear some air:
This from 2016.
Thank you for posting this link. The lecture by Professor Mearsheimer is very insightful and accurately breaks down the internal dynamics of Ukraine as well as the likely future outcome if the West keeps pushing the Ukraine toward a hard-line anti Russian stance.
Sadly, years later his insights have proven to be prophetic and the greatest victims in all this are the Ukrainians. Clearly there is a significant divide within Ukraine and it was also predictable that it joining NATO was Russia's red line. In that sense, Russia's current actions, as deplorable as they may be from an international law perspective are entirely predictable.
As a fellow Slav my heart bleeds for Ukraine but also for the average Russian as this is the definition of a fratricidal conflict. Talking from a cynical and Machiavellian perspective, the West not only will be sitting this out but they will be happy to fight Russia to the last Ukrainian. May this conflict end as soon as possible and I pray that the casualties of the innocent are minimised.