Don't forget that elements of Al Qaeda were trained by US intelligence, thats a well known and documented fact. Another thing is, you guys were/are supporting regimes in the Middle East that have contributed to the spread of radical ideology, albeit indirectly.
ya, its what makes these people even more disgusting and hypocritical, most of them immigrate to Western countries, take advantage of the freedom they have there, some even take advantage of the welfare system. Then after leeching off those countries for a number of years, they brand them all infidels whose blood is halal.
Nothing is more disgusting than those radicals, unfortunately the region has a tough choice to make, you either fight the authoritarian regimes who probably contributed the most to spreading radicalism(albeit indirectly), that way a vacuum of power ensues that radical groups such as ISIS take advantage of, or you focus on fighting these radical groups, which benefits regimes such as Assad's. In the short term the obvious choice is fighting the radical groups, as they may seem like a lesser evil than the likes of Assad's regime, but what you are doing then is strengthening one of the main reasons that led to the existence of such groups.
Its all very complex, and not as simplistic as many would have you believe.