Dumbass did it for the Gulf Arabs / Saudis

He was triangulating between his fading master, Putin, and his new benefactors, the Saudis.
Russia is throwing client states under the bus once they have wrung guns and tribute out of them. When Israel blew up the drone factory, it was only a matter of time.
MBS and Bibi both want Iraq out of the war bidness, and a distraction from the ethnic cleansing of Palestine.