Bomb the hell out of the Syrians? Surely they have suffered enough.
Iraq III? Maybe this time.... maybe....
Send the ground troops into Saudi? Quatar?
Acknowledging that some of ISIS / Al-Qaeda gripes do have some merit, stop interfering in other countries affairs, stop propping up dictators because they are "our" dictator.
Something else?
Unfortunately for the Syrians, my money is on bomb the hell out of them, trying to limit the number of "collataral damage" of dead women and kids, but hey, not our fault.
And so we go round the merry go round again.
Though fusion is a long way out, hypothetically, if we didn't have any reason to interfere and could just leave the Middle East to figure out its own problems, they wouldn't have a reason to see us as the enemy.
Our dependence on foreign oil is no longer an excuse for our meddling in the Middle East.
We meddle a lot less overall in the Middle East the last 8 years than the prior 8, right? If we don't then Russia steps up to do it themselves (for better or worse US has no leadership there anymore so maybe why not Russia give it a shot?)
In the end I personally don't believe the massacre is in any way "caused" by US or other foreign involvement in the Middle East. This is not the first caliphate, nor will it be the last, and it's not about righting wrongs or a struggle for independence, it's literally about inflicting mass casualties on the infidels in as an atrocious and terrifying (i.e beheadings) manor as possible.
Over 100 murdered is a mind boggling atrocity but also a terrible security failure. Not just in failing to catch and prevent it, but failure to take out the shooters at the concert sooner. (I haven't read a detailed account of how the shooters were stopped if there is one)