The best steelman argument[1] is that it was a failed gamble. The protests of a few months back (also the improbable success in Venezuela) made them think they could topple the regime. They couldn't.
It's been clear for weeks now that the US has lost this war. The only question was how long it would take Trump to disengage and what the trigger would be.
And the answers appear to be "two more weeks" and "when one plausibly genocidal gaffe went too far and fractured his domestic coalition".
[1] Which... I mean, steelman analysis has its place. But really no, this was just dumb.