Call me a pessimist, but I doubt that the US will pull out of NATO. NATO grants them immense strategic leverage, and the ability to define the borders of its empire by placing troops in key countries. The ability to rapidly engage in conflicts and project its power. I highly doubt that the US will ever pull out - even if the angry orange shit stained child decides to. It would be a nail in the coffin, and the Pentagon knows it.

The orange shitstain has instituted quite some purges in the administration, but also in the military top brass. And his regime are drinking their own Kool-Aid. The Pentagon went along with drunken Pete’s unhinged “Deus vult” style crusade rhetoric before the start of this war. I think there is legitimate hope that they will do the World the favour of ridding it of a good part of their power projecting ability.

Your second point, of the US turning back to normal… I doubt it. You have 77M people who voted for this.

Here I have to agree. The Trump regime is just a symptom, and from the political establishment, even from the opposing party, there is little to no tangible push back. The orange shitstain going away won’t magically repair the underlying problems, as you said, ridding Germany of the most outrageous excesses of fascism took a total defeat followed by years of occupation and careful state crafting. And even there, a lot of the fascist shit survived under a thin veneer of democracy, (or, in East Germany, “democracy”) and is currently coming back, because the political caste is forgetting the lessons learned from history, and once more believe they can control and use the fascists as a tool for their own benefit.