And this can trigger World War III with unpredictible consequences.
Hardly pragmatic Americans are ready to risk the lives of 340mln Americans and 450mln Europeans by openly attacking forces of a thermonuclear superpower like Russia because of third world east-european brothel they call Ukraine, which they have no any formal obligation to protect.
If US attacks Russian forces, you are in a Great Power war....one side has already used nuclear weapons and the other is ready to fight WWIII and risk the lives of its citizens because of Ukraine?
C'mon, US will never risk Great Power War and WWIII and put at risk lives of its 340mln citizens because of Ukraine even if Putin nukes Kiev.