President Trump called them "evil losers." I have no problem with the use of that label. The "loser" part may be calculated to diminish ISIS recruitment of young people but it carries weight on its own. The "evil" part, of course, is the main feature.
There is something particularly evil about a group that supports and applauds the intentional murder of young people and children. This recent atrocity, however, is simply a reminder of their nature; a nature that includes cutting throats and burning people alive. We've seen enough evidence of how they revel in cruelty.
No negotiations. No rationalizations. They have got to be destroyed.