Vietnam was Lyndon B Johnson making money from weapons procurement and supporting his donors. (Such as Brown and Root, who started the war as a tiny firm and ended it as one of the biggest contractors in the US.)

Iraq was Dick Cheney's sponsors making money from oil and arms deals.

Afghanistan was Bush's sponsors making money from weapons procurement.

Iran is Trump's sponsors making money from oil and arms deals, plus some crusading crank millenarianism for the faithful.

Gaza is a straightforward land grab and real estate development opportunity with some cynical other-abuse thrown in.

None of these have anything at all to do with realistic threats to non-rich people.

It's always money. Always. Someone always makes money from these things.

The disposable shlub in the Oval Office gets the reputational damage, but their funders are so happy they can barely count.