1. He's literally just a moron and is fixated on tariffs. Many think that's most likely but something tells me it's not the whole story.
2. They see a war with China coming in the next few years and they need to decouple as quickly as possible and make sure the US is not reliant on China or Chinese manufactured products, while also potentially harming Chinese trade. Something to ask here is, if we thought we were going to war with China over Taiwan in the next few years what actions would we take now to better positions ourselves for that coming war? Making our allies angry doesn't seem to be helping, but were EU members really going to send troops to the Pacific to defend Taiwan anyway? Certainly not when they have Russia at their doorstep.
As you said, China just shifted their manufacturing to southeast asia and many of them are still backed by Chinese money. Also the made in US thing didn’t really happen either.
I'm not saying I agree with this, just trying to think through what they may be thinking for fun internet discussions. Personally I love our allies and I think they make us way stronger and we should work together with them to address concerns.
I wonder if the end goal of wanting onshore manufacturing is to be able to defend or attack using cheap modern electronics.
https://www.technologyreview.com/2024/06/26/1094249/china-co...
These tariffs are a wonderfully regressive tax that will hurt the poor and middle class. The beneficiaries are his constituencies, the rich and privileged.