The single hottest tickets in the world are for death penalty executions...anywhere. The highest priced black market videos are snuff films.
ISIL is not a bunch of illiterate madmen, but cold, calculating assassins with psychology degrees. They know the US media will pay for visuals like this if they could get away with it. They know Americans will be horrified and drawn to it at the same time and they know you are squeamish when it comes to children and women. I once saw a quote from an Iranian madman arrested here who said in effect 'Americans are too easily sickened by real war. We only need to incinerate some babies and they will cry to their mothers.'
This is why I have been so opposed to the self censorship of the media about Islam, cartoons etc., we have allowed them free access to horror, but save them the discomfort over fear of reprisals. The only way to get these guys is to make them totally uncomfortable with everything....and that means attacking Islam itself just as I would attack the Christian Church if such atrocities were carried out in it's name. Just as I rail at my own Baptist denomination for allowing the Westboro people to use the name. We must show them how ridiculous we see them, just as we showed Japan and Hitler what fools we could make of them. Charlie Chaplin did more to advance the cause with one movie more than all the efforts of the American Jewish community. If Islam is so tame in practice they will, as other faiths preach, forgive.
Since 911, IMO, the west has been negligent in holding legitimate Islam to account. AL-Qaeda and ISIL get $ from somewhere, and it's flowing through the Islamic world, not Christians, Hindus, Sikhs or Buddhists. It's not the Russians or Chinese, it's Muslims. That has to be stopped either through co-operation or force, but it has to stop and if Muslims in America don't like it, take it up with terrorists. If they're really American, they will be eager to co-operate.