I believe this is actually the center of the matter. Trump surely does not represents all the Americans, but I believe he is currently acting in a so aggressive way because America has a problem, that is: for years governments of other countries are selling more and more US bonds (because the United States look progressively less able to pay back), and given the US huge debt, this would mean an incredible problem for a country that for decades spent ways more than it was possible or wise (and, this spending also helped to fuel the IT strong position the country achieved). So, now, in order to have compelling arguments to ask for certain conditions, Trump is acting in this way, since in order to have something that others don't want to give to America, America needs to be a problem the other countries. This is a way to amplify your position in the world, that is otherwise not as strong as in the past. We used to watch Russia doing something like that, and could not expect to see this from USA. But things evolve...