We ignored them
Now we are doing it and yes it upsets the world order
There is no precedent where this has been beneficial for the US, but we can try again. The last time it was tried was 1930, and our fortunes vastly changed since then
The incentive is for entrepreneurially minded people to try to provide services in the US and fix the supply chain here. This theoretically means more people employed and more people able to afford the prices of things produced here. Keeps velocity of money in the economy high.
We will learn how resilient a coalition of other countries are, as they try to only trade with each other
A smarter version of this policy would be country by country and industry by industry negotiations. But, given that some countries are dropping their own blanket tariffs, and others like Vietnam already coming to the negotiating table, time will tell.