There was a trade imbalance against the US.
Now, the tariffs are exaggerated in the opposite directoin.
But Trump is trying to get the Federal Reserve to lower interest rates.
Trump's real estate background taught him to re-finance the debt in low interest rate environments.
So his goal is to re-finance the US debt at lower interest rates, re-inustrialize the US, and fix the current trade imbalance.
He's not delusional and crazy.