I just shake my head in disgust at the latest atrocities committed by ISIS. They are a group of sociopaths who must be stopped. However that is easier said than done. How do we do this exactly? As others pointed out they move among the civilian population so to just outright attack them means a LOT of innocent civilians will be killed which will cause more hatred for the US. And I am sure they would LOVE nothing more than American boots on the ground so they could say this was a holy war against the infidels. Fighting them on their turf would bleed us dry.
So the other solution is to arm those who are fighting ISIS---the Kurds, the Shiites, etc. However there is no way of knowing whether this will lead to a genocide against ALL Sunni's---since ISIS is a Sunni lead fighter group. So if the people we are arming to fight ISIS turn out to be homicidal maniacs what do we do then? Arm the Sunnis?
Of course we could always let the Arab nations in the region fight ISIS. The Saudis, the Jordanians, the Lebanese, etc. But that poses problems too like what if ISIS starts kicking their asses? Then what do we do?
There is no easy solution to this. I for one would not want that decision on my shoulders. Those on the Right who are calling for military action are just morons in my opinion. They don't think things through. No matter what happens it won't be pretty.