The arrogance is extraordinary. The debate seems predicated on the notion that if something goes awry in the world, it's because the Americans in charge aren't managing things properly. Somebody must have slipped up. In other words, it's their job to run the world. It seems incomprehensible to the American political class that they should not be involved in everything that's happening everywhere.
Sadly, there's a certain truth to the notion. The U.S. is constantly interfering in the affairs of other nations, and apparently they have been interfering in the Ukraine. That they should leave the Ukrainians and the Russians alone to sort out their own quarrels just doesn't seem to cross the American mind, or at least the political minds.