It's like he can't comprehend that other people would react to his actions.
He raised tariffs, other nations reduced trade with the US and looked elsewhere. If he continues to raise tariffs it will inevitably cause the US to be isolated in trade.
It's not even a shocking/daring tactic, it's a self destructive tantrum because his misunderstanding has led to mismanagement and now he's doubling down
I agree with almost everything here, but I don't think an embargo on China would be as damaging as you think it would.
It would hurt, don't get me wrong, but China is largely in the position it is now because the developed world was looking for cheap labour and China fit the bill. There is no lack of underdeveloped nations who would gladly shift their economy if it meant they could support a fraction of the manufacturing supply that China currently commands. Africa and South America (not a single nation, I know but this is true of many African and South American nations so I'm combining for simplicity's sake) is positioned both politically and geographically, to be a sudo-China in terms of manufacturing if the wider world decides to embargo China-proper.
The US and EU pulling out of China would devastated them far more than it would affect the former. I'd like to think that the EU at least, would be willing to withstand some economic damage to aid another nation in need.