Agreed. Cohen really should have gone back further in his argument on that.
You basically had 2 power vacuums in the region. Iraq and Syria. The former we broke when we invaded Iraq. The latter caused by Assad.
Obama decided to stop the bleed in Iraq and get us the hell out of there. The 3 factions despite what Bush thought will never get along, the Kurds, Sunnis and Shiites.
Biden was probably the only one intelligent enough to realize that we should have carved up Iraq into 3 zones. And that probably wouldn't have worked.
So we ended up with 2 unpoliced countries overrun by a bunch of thugs. (which is really what they are despite Trump's twitter rants) Not really any different than the gangs in this country.
Be courteous to all, but intimate with few; and let those few be well tried before you give them your confidence.
-George Washington