Earlier quoted context omitted.
And here I thought that since march of this year, we're of the general impression that countries have the right to defend themselves, and to seek external allies when bullied by a bigger neighbour...
We didn't invade after the Cuban Missile Crisis; in fact, Cuba remained closely aligned with the USSR until the end of the USSR. If Russia merely sanctioned Ukraine, nobody would be discussing this. Your rebuttal is facile.
If the US simply sat around on its hands and sanctioned Cuba, and left things at that, nobody would be discussing this. It went way, way, way beyond sanctions.