The US has pretty much withdrawn from all international organizations (or is simply ignoring them, see WTO). The US is not abiding by any international order.
The US is economically terrorizing the world by aggressively pushing the dominance of the US dollar. It has (successfully, to date) prevented the Iranian Oil Bourse (in €, 2008).
It interferes in the sovereignty of nations: for example, it has enforced the Iran embargo (against the will of the EU, which has been powerless to prevent it).
The world trade order is tilted in favor of the US, as are IP rules (favoring the incumbent power, with a head start of several decades), making the rest of the world subservient to the US, and forcing us to finance the life style of a minority of the planet's population (to be correct: to finance the lifestyle of a very small minority of the US population, since lots of Americans are also struggling)
The US has built its industrial and technological supremacy by industrial espionage during the late 19th and early 20th century, from the leading powers of the time (Europe).
The US has engaged in price dumping of agricultural products for ages, by illegally subsidizing farmers.
The US has interfered militarily, politically and economically around the world, often with devastating consequences in terms of life and property, creating power vacuums which have caused catastrophic consequences.
This is going on as we speak. The list is very long too.
I for one support the Chinese in this conflict, if for nothing else, simply for the possibility of putting some restraint on the out-of-control Hegemon.
I understand that US citizens will be siding with the US president on this one, and you may even feel you are being fair here.
You are not, and the rest of the world is pretty much not in agreement with the US.