Other countries know that we lost our mind as a country and we'll revert to the mean after 4 or 8 years of living down by the river in a van, right? I hope that myself :-) We'll go back to believing in calm international relations based on respect, not whats on tv shows or helps a politician in certain state. We'll go back to being a normal democracy, assuming that our former close allies haven't been destroyed or anything. It'll be ok with our buddy Canada, right?
People also thought there was no way Trump would be elected. It's not just the US, but Hungary, Poland, the UK (Brexit), and many, many countries with problems with right-wing populist nationalists. Imagining it will fix itself seems pretty dangerous. Either diagnose the problem, organize and act, or it will get worse. Much of the Internet and many people I know won't even discuss it, which puts us a long way from what needs to be done.