The thing is, the “America First” and ” Make/keep America Great” rhetoric resonates with a lot of people. They will not see the formation of a Russia-centric power block in the middle east as a threat right now, only that the US troops are coming home as promised.
Never mind that this could increase instability in the region and, ultimately make the world a less nice place, ‘we’ are fine.
Trump is a very useful person for someone; whoever they are, they have played a blinder. It may even be that Trump thinks he is the one in charge.