Well there you have it.
Why the hell are we even contemplating getting involved in this. This is not our fight.
We should of course keep an eye out for any terror cells planning attacks on US CITIZENS. Europe should do the same for its citizens.
What I see is ISIS is trying to unite MUSLIMS into one caliphate. Good luck with that. They will never succeed in getting Muslims to join together under one banner, their religious hatreds go too deep. But why not let them try? To attempt what they want they will have to kill a few million other Muslims.
When your enemies are fighting against each other ... do not get in the way.
They will succeed if they kill enough of the “wrong” Muslims.