It was after the assesment you mentioned thatObama turned his back on the Syrian patriots and the others in the coalition and jst backed out.
There s no defending Obama. He is a villian
The ‘Syrian patriots’, or ‘moderate rebels’ or whatever you wan to call them were a stalking horse for the jihadists.
The effort ultimately failed because Russia intervened and the US doesn’t want to start WW3 just to replace the Syrian dictator (wisely!)