Clearly, the murdering scum of Syria and Iraq need to be punished for their crimes against humanity.“Japan’s prime minister has condemned as "outrageous and unacceptable" a video declaring the murder of Japanese hostage Haruna Yukawa by Islamic State.” Condemning them won’t do that. They have to be killed. The world can create an expedition that could wipe them from Earth in a few weeks. Get on with it. Not eliminating Assad in Syria a couple of years ago allowed this mess to fester. Now it’s time to correct the mistakes of the past. With close air support and a determined force of a few hundred thousand, this matter could be settled soon. Delaying just makes it worse.
There are signs that the Kurds and Iraqis are making progress in Iraq but the real problem is in Syria and limiting the cure to Iraq is short sighted. Forces can rapidly be brought in from the Mediterranean, Turkey, Iran, and Saudi Arabia, to surround and annihilate them. No doubt some will escape but the problem will be greatly reduced in size. When the dust settles, a constitutional congress should be set up in either or both Iraq and Syria to make sure a functioning society is left before departing.