1- Nothing, IS has just much legitimacy as the US did, so they are being ostracized just the same. The glaring detail that is escaping you here is that the US army is not in Iraq right now. So please do us all a favor and stop evading the questions with outlandish and anachronistic comparisons.
2- IS is a direct product of saudi ideology and was heavily financed initially by them and qatar. If the saudis choose to live that way so be it, their land, their rules. Wannabe rappers from bristol and frustrated saudi teens have no right to go anywhere and tell people how to live.
3- again please stop with "they", "the media", the illuminati... debate our points and posts.