Civil wars create refugees who wish to flee the violence and destruction of the infrastructure. The Russians have invaded Ukraine despite their protestations otherwise.
The crux of 2014 was not the issue of historic brotherhood among Russians along the Black Sea or Kiev’s utter incompetence —> It was the Stalinist, Soviet nostalgia motivating the annexation and its embrace among the populace.
It’s not about the demographic rationale for Crimea, so much as the spirit in which Putin carried out the deed.
His speech echoed Hitler’s own rhetoric regarding tbe anschluss of Sudetanland (which was also cheered for at the time.)
The other points to take away include the accompanying consolidation of draconian measures and grip on power the Kremlin has established since then... Also their perpetual assaults on the rest of Ukraine and their desire to destablize thr Middle East via Syria and Iran. Among a host of other things.