Hitler didn't have nukes and super-sonic missiles -- you cant do to Russia what you would want to do to Hitler.. at least not without a very heavy price..
At some point you have to just call their bluff. Earlier is better than later. Putin himself knows that he'll be the first casualty in nuclear war, and I doubt very much that Putin's deputies would go along with a plan that results in the annihilation of the Russian people. He's playing a high-stakes game of chicken.
Putin is gambling that the west is too cowardly to fight, and so far he's right. Hitler made the same gamble in 1936.
While relatively late in the war so it didn't have too much strategic impact, the Nazis literally invented the supersonic missile.