The first two Godfather movies should be required viewing for Political Science 101. It's Plato, Machiavelli, von Clauswitz, and Sun Tzu, in Technicolor.
Bonasera comes to America and finds freedom, peace, law and order, circa 1990.
Then young punks (Putin) rape his daughter, twice, once by taking Crimea back, and again by putting paratroops in street clothes into Donetsk and Luhansk, and claiming they wanted "independence".
Finlly, Putin comes back to rape and pillage a third time, and Bonasera goes to the Godfather (the West) for justice.
The Godfather sends a couple of Clemenza's people, Javelin, NLAW, etc., over to break the punks' legs, and now Bonasera finds himself forever indebted to the Godfather.
Putin hasn't been able to take Ukraine in three months and tens of thousands of casualties of trying, and he's bleeding himself white for the effort. And the Godfather is upset with him for disrespecting his protection.
All Putin can do is scorch the earth, endlessly, and win a mouthful of ashes. He's a proud fool, and a slow learner. When broken knees don't get the point across, the arms will be next.
But the West could snuff out Ukraine's candle with the snap of a finger, merely by withdrawing any further aid.