[burfog]

It's quite easy to wipe out ISIS.

The problem is that it is unpalatable to a significant portion of our voters, probably you included. Think back to when the US defeated Germany. We leveled Dresden. It is entirely possible to wipe ISIS from the face of the Earth, sympathizers and supporters included.

Regarding the inevitable suffering and death, quick solutions can't hurt more than the current population. There is no such limit if we let things fester forever. Trying to avoid conflict just drags it out, preventing recovery. We could face the suffering and death of many many times the current population.