- there is a concerted effort to target and topple oil producers which China relies on as a form of containment of the Chinese economy. Venezuela, Iran, eventually Russia in a more direct way. The current administration is willing to accept economic pain for just about everyone because they see the transition from petroleum to green energies as the death knell for US superiority. They see this as their last chance to derail China, so they are taking it. It provides incidental value (like giving pre-text for increasing domestic repression).
- they thought it would be easy after Venezuela and Trump was flattered by Netanyahu and pressured by evangelicals into doing it.