The US represents 5% of the world's population. There are other countries who are far more insulated than the US. If one country with 5% of the world's population can "destroy" trade by putting tariffs on the trade with one country what does that say about the other 95% of the world's population?
Trump's policy is based on one simply formula -- he wants the trade to be balanced between the two countries. The same value of goods imported will equal the same value of goods exported. I can see how that might be slightly disruptive, but for you to say that it "destroys" trade for the whole world, what does that say? It is as though the whole world are parasites.
I can see that the world's economy based on the current model is not sustainable. I can see that every empire prior to this was the same. Egypt destroyed that nation, the Fall of Rome, the destruction of Babylon, Assyria crashed and burned, the USSR crashed and burned, Greece, Medo Persia. I lived in the UK for a year in the 70s. This used to be the Empire on which the sun never set, but at that time it was greatly humbled. I can see that when you borrow money the day will come when you have to pay it back. That day has come for the US and also for the rest of the world. Is Trump a liar? I lived in Taiwan for eight years and I saw how easily an entire nation can build their "kingdom" on a lie. I learned that in China nothing is as they would have you believe. Trump may be a liar, it is too early to tell, but so far what has really gotten people upset and riled up about him is that he has done exactly what he said he would do. The whole world is so used to liars no one expected him to do exactly what he said he would do.