The men in ISIS(from Saddam's regime) were less ruthless and kept in check by Saddam Hussein because of the public sentiment about his regime, and also kept in check due to Iran's efforts. Iran's efforts were more diffuse than when Saddam Hussein was in power.(focused more on keeping Bashar Al Assad in power, just as we were too focused on toppling him) Obama left them to their own designs until way too late in the game. Bashar Al Assad unwittingly played decoy in allowing ISIS to be unchecked. And golly gee, they were worse than they had ever been in Saddam Hussein's regime. For that we have Obama to blame. Oh and by the way, we never did get Bashar Al Assad out of power. Every bad decison Obama has made in the Middle East has been related to Iran in some form or fashion, including the horrible lifting of sanctions on Iran. Iraq was GW Bush's albatross, Iran is Obama's. It was bad during Bush's presidency, now it's worse in Obama's. Iran is a much worse enemy to make mistakes with than Iraq ever was.