The quickest, easiest way to deal with ISIS is to give them what they want: meet them on the ground in Syria.
They have one goal. One goal which has one signifying event and several "side effects" entailed in the fulfillment of that goal. The signifying event of that goal is a victory over the forces of the West in a battle, on the ground, in Syria.
Oh, and - in case you didn't know - some of those "side effects" which will come about during and/or immediately following the meeting of that goal are: the "death" of Judaism, the "death" of Christianity, and the eradication of every Jew on Earth. No, that's not hyperbole nor exaggeration.
This is one of those rare opportunities where we actually know the enemy's plan. And we don't seem to have the balls to take advantage of it. The attacks in Paris are all part of this plan. Such attacks will continue, in any number of Western countries including the U.S., until we meet them on the ground. That's what these attacks are about: inciting us to come to them and meet them in battle on their "holy" battleground.
If we actually were to go in force, on the ground, to them in Syria then we would actually meet them in battle. Unlike their "command" and recruiting personnel behave in other countries - running like roaches in order to fight another day - there they would not run. They would step out into the light. They believe it is God's will - and their destiny - to meet us on that battlefield and destroy us.
Yes, we would lose hundreds if not thousands of soldiers if we met them on that battlefield. However, how many lives will be lost in future attacks similar to those in Paris if we continue our current behavior towards ISIS for another four or five years?
And, no, doing so would not rid the Earth of radical islamists who see violence against us "infidels" as an acceptable option. It would, however, rid us of a large majority of the single-most aggressive, ruthless, and violent group of radical islamists we've ever seen.