Little confused . . . are you talking about the following?
US-led coalition air strikes in Syria 'kill 77 civilians mistaken for Isis fighters' - Jul 21, 2016
U.S. Admits Airstrike in Syria, Meant to Hit ISIS, Killed Syrian Troops - Sept 17, 2016
US-led coalition killed 300 civilians in just 11 air strikes in Syria, Amnesty International report finds - Oct 26 2016
Excellent questions.
What did he say about those 2016 attacks by Obama?
Good one. Where were the weeping hand-wringers when Obama pulled those stunts?