Americans have to hope that the US will move past trumo and not repeat that mistake, but for europeans its most prudent to prepare for a world where such a corrupt wannabe distator doesnt have have that much leverage over them.
The US and europe would be stronger together if the US acted in good faith. Absent that, decoupling is the right choice
Germany also has a crazy Communist party that is more in the pocket of Russia than AfD is -- but somehow that is almost never mentioned, not even in German media. It's quite big and influential.