Merkel is calling for European countries to look out for their own interests. US policy evaded this outcome for 70 years, and Trump destroyed it in 3 days.
Europe descends into a continent-wide war ever 40 years whenever European powers pursue self-interests in complex alliances. And, no, this time is not different.
How fast the slide into World War III occurs depends on how much Trump appeases Putin. At the moment the signs aren’t good. Russia is economically weak and militarily potent, which is a dangerous combination in a proud and traditional power, especially a waning one.