Likely it's a lot simpler.

Trump wants our allies to have no tariffs on us as long as we protect them. And maybe wants a 5-10% tariff or similar on them so that we win on trade, but only by a reasonable margin. Also with guarantees on equal trade with low or no trade deficits on average. And to bring back manufacturing jobs to the USA. All of these things he has been talking about for decades.

The Yo-yo approach is mostly to put other countries on edge and make them want to make a deal sooner rather than deal with the instability, and 2 reward the reasonable countries that come to the table quickly with a stick and carrot approach.

Also, if he gets rid of income tax or has the lowest income tax in the world then Europe won't have any billionaires left living there within 10 years. He's made it super easy for them to get green cards with just 5 million in cash.