Is the U.S. the moral authority of the world now? As far as I know, we haven't given them a free pass. If they threatened our allies, then certainly, military action is warranted. Otherwise, we condemn and sanction as we have. Let Europe, worry about Europe. To me, Ukraine is a distraction. The Biden administration uses it as a source of all our woes.
Also, think of it this way. After the Afghanistan withdrawal debacle, do you really trust these same military leaders to lead us to victory elsewhere?
All else aside, sanctions have never accomplished anything really.