CNN Positing : Former Iraq General says that U.S. mishandled ISIS

I read other viewers comments on this news clip.

Someone insists that U.S. should deal with the problem by military attack before they become too strong to control. They are worrying ISIS's repeated threat that they will attack U.S.

However somebody claims that U.S. needs to concentrate on its own country instead of external affairs.

Two days ago they executed one more person. He was British worker David Haines.
Moreover, in their video they anounced that they will continue this murder until they achive what they want. This is too horrific. How we can stop them? I wonder whether we can stop them.