

Trump wants to put a puppet or quasi-puppet in place as happened in Venezuela, where the vice-president Delcy Rodriguez was allowed to keep power apparently in exchange for accepting that the Americans will seize oil tankers and give back only a share of the revenue.
No benefit or regime change for the people of Venezuela. Iran stops threatening Israel and probably the US gets some oil revenue.
Trump repeats what works for him.

The US has killed his wife, son, parents, sister, brother-in-law and two children. The Iranians will consider them religious martyrs.