The only “fault” of Bush is that when we had everything in the world in Iraq, he should have taken out Syria as well and done the hard work. Also should have pressured the hell out of Iran and maybe reduced their nuke and other capabilities.
But yes, if Obama wasn’t a cowardly leftist who can’t consider helping Iraq, none of this would have been necessary. He easily could have taken lots of actions to prevent this, from a continued US presence, to effective action in Syria.
And how about even having a clue that this was about to happen?
Syria wasn’t even on the frick radar except as the place Saddam took his weapons of mass destruction.