Not was colluding, is colluding. This ISIS excursion into Iraq is part of Uncle Scam's proxy war to overthrow secular Syria.
Benghazi was a gun running op to get get captured Libyan weapons to Al Qaeda foreign mercenaries in Syria. ISIS is merely rebranded, new and improved Al Qaeda.
I would argue that for reasons not known but probably the current events in Iraq, Obama left or was thrown out of the coalition to oust Assad in Syria.
The fact is that after Obama resigned the coalition, it has continued along the path it set out to follow.
We simply have no part, no leverage, diplomatically or military in the current events.
The problem with the guy in question is what he knows and can tell.