Over time, lopping off heads does not do a heck of a lot to win friends or influence people.
every ISIS fighter that is captured alive should be also beheaded and his body left to the dogs . This is the message that Iraq/Syria need to send to the hairball muz wanabee jihadist potential recruits in Europe and elsewhere . Come to the Caliphate and end up as dog meat .
This should apply to the female ISIS they catch also .
No mercy , no quarter , no remainder .
Use chainsaws