And I can't help it if none of the factors listed appears sufficient to justify US involvement in a conflict, that could easily escalate (intentionally or unintentionally) into a nuclear war. Bear in mind that the war is unlikely to ever involve nuclear weapons, if we let the Europeans handle it, but would be much more likely to 'go nuclear' if the US continues to increase its participation. Ukraine was not worth going to war over, when it was in the USSR, and it's certainly not worth risking war with Russia today...
I don’t agree with your analysis, but that’s ok your points are valid.
+1