By killing him in such a grotesquely barbaric way, ISIS should rouse the decent, civilized Muslim world as never before.

It’s easy to justify attacks on the West by screaming to young, impressionable poverty-ravaged minds that it’s ‘revenge’ for all the bombing campaigns in Iraq or Afghanistan.

It’s far tougher to justify the bestial immolation of a young Muslim man to other young Muslims.

This war, and it is a war, will not be won by American military power, although that will play an important factor.

It will be won by the Muslim world turning on ISIS, rooting them out of their societies and bringing them to justice. Of the legal or fatal kind.