Gatestone Institute's web site, he makes the following points and makes them well:
1. Throughout a bombing-and-murder campaign lasting three decades, the BBC never referred to the Irish Republican Army (IRA) as the "so-called IRA." If you flatten ISIS's military, the strong-horse appeal of ISIS would simply go away. If there is nothing to join, no one can join it.
2. Cameron's and Obama's tactic is to deny something that Muslims and non-Muslims can easily see and find out for themselves: that ISIS has a lot to do with Islam — the worst possible version, obviously, for Muslims and non-Muslims alike, but a version of Islam nevertheless.
Read the article here.
I suggest you subscribe to Gatestone Institute (see the subscription box in the upper right sidebar). Their articles are reasonable, authoritative, and make excellent points. They're the kind of articles you can share with others without any feeling of embarrassment.