The US is unreliable to do trade with, so I'd simply look to diversify my customer base to not be at the whim of an erratic old man with a narcissistic personality disorder.

In the end I am pretty sure the US can't be avoided, but today the US made sure that those who had good ties to it got punished and the world will remember that. I would like to think the world might ask it self if the USD should be still be the lead currency.

The rest of the world wasn't at fault that US capitalists decided to outsource their manufacturing base to cheaper countries. I guess someone in the US got damn rich doing precisely that. Those are the people you should blame.

Additionally tarrifs cut two ways, if countries react as tou would expect them to. The EU got the biggest single market in the world, and the US just made it harder to sell their stuff there — again, beyond pure costs, reliability is an issue in itself. Why would the EU buy something from the US when products from elsewhere have less tariffs and you don't have to deal with the scenario of an erratic political leader making it up as he goes which makes it somewhat impossible to rely on a plan.

Having bad leadership is a thing that costs a nation dearly. I don't see why the rest of the world would feel inclined to carry that cost.