He's actually not spot on. There's little indication ISIS or similar groups wouldn't exist in a security vacuum of the Syrian civil war. The idea that limited weapons given to moderate Syrian factions have created ISIS is also wrong, as they are looting Syrian government weapons as well, and using whatever they have been able to take off fleeing Iraqi units. Even if one were to take the position that the US introduced those weapons into the area, they were clearly intended for moderate factions (the Iraqi military and non-Salafist Syrian groups fighting Assad). What he conveniently doesn't address is that ISIS would not be what it is today if the Iraqi government would've kept a small amount of US troops in Iraq after 2011, which at least in Iraqi terms, has led us to where we are today. Had they done so, they would've provided the necessary air support to allow Iraqi and Pesh forces to repel ISIS much earlier and avoid the needless slaughter of thousands, as well as kept a vast majority of them bottled up in eastern Syria.