Exactly. All the F-15’s, F-16’s, F/A-18’s etc are doing is p*ssing them off. Let the big boys carpet bomb them for a week or so and then see if they want to have a meaningful discussion.
Bring on some Linebacker type bombing and see how long ISIS fighters take to go AWOL.
Said it before, and I borrowed it from someone: If it is worth a strike, leave them with nothing but smoking ashes and greiving widows. Then do it again and again.