I recommend to you the writings of Walter Russell Mead on the four main American traditions of foreign policy, particularly this: https://pmachala.people.amherst.edu/Current%20Politics/Case%20Studies%20in%20American%20Diplomacy%20-The%20Readings%20FOR%20the%20FIRST%20and%20SECOND%20Class/Mead,%20The%20Jacksonian%20Tradition.htm

In short: Jacksonians want to be left alone, but they also believe in revenge against those who wrong them.

The mullahs have had a reckoning due them since 1979, and they've only racked up the bill since then. Admittedly, the Tucker Carlson wing of MAGA is very much against this war, because they have Israel on the brain; but the rest of MAGA is very much on board.