What I said before and what has been denied by the Trump followers here now has been confirmed by the UN.
ISIS is flourishing in SDF areas and even back in the oil business.
ISIS given ‘breathing space’ in parts of Syria under US-backed forces' control
UN-Report:
S/2018/705 - E
So you setup a lemonade stand. Welcome the neighborhood bully—the real nasty one who always wears engineer boots and rolled cuff jeans and a heavy, silver spike studded jacket—to come work there for you, invest some of his own weak kid protection money, so you can convince him the neighborhood has forgiven him his savagery, so he draws out the rest of the bullies—the worst of the worst, the ones destined to be future permanent residents of the state penitentiary. A few weeks later, with all the most barbaric bullies having now taken over your lemonade stand business, running it as their new hangout gathering spot, you bang it with a thermobaric grenade. No more bullies. Build a new lemonade stand on the next block over. Business as usual.