No, the main problem is Sunni terrorists who Iran fights.
“No, the main problem is Sunni terrorists who Iran fights.”
I would agree with that a year ago, but ISIS has since been crushed, and Iran has now (effectively) seized the Kirkuk oil fields and secured a ground supply line all the way to the Mediterranean, Lebanon and Israel (the whole of the Saudi/Jordanian Northern Flank).
Al Queda is still huge in Idlib, but I expect that it will (once again) be Iran (Gen Suleimani) sending folks to kill Americans, to drive us out from Syria - like they drove us out of Lebanon in 1983 with the Marine Corps Barracks bombing, and believe they drove us out of Iraq.
If the Saudis have flipped however, as seems likely, the Sunni jihadis will be withering on the vine, with only Turkish support.