America needs to be clear about ISIS. It is a terrorist organization. Terrorism is a crime. The fact that this terrorist organization has taken advantage of the power vacuum in Syria and Iraq does not automatically promote this organization into statehood or nation. A nation cares for its citizens and facilitates civilization. ISIS does the opposite of this. Those who live in the area that ISIS claims are not its subjects but rather its victims.
War is not an appropriate response against crime. War is an appropriate response only against a real nation/state. We made the mistake of responding to the September 11th terrorist attack as if it were an act of war. The current anarchy that has allowed groups like ISIS to pretend to be an Islamic state was partly caused by that past error. It is essential that we do not fall into that trap again.
This organization is despicable, and I do not see an easy solution to ridding the world of them, but that should not mean that we react by responding with warfare. I would argue that this plays into their hand. They would love to be able to claim that they are some sort of religious martyr fighting against the western infidels. They got most of their weapons from America indirectly, and they would love for us to send more weapons that they might be able to capture.
We need to respond as we would to any despicable crime being committed in an area where local law enforcement is ineffective. What does that mean exactly? I don’t know because I am not an expert, but these terrorists need to be tried in court rather than engaged in battle.