Horse puckey. ISIS, like Islam, is an idea. Especially with the advent of the Internet, no idea ever altogether goes away. So they can just get that notion of "ideological defeat" out of their pointed little heads. It's just like smallpox. It might have been defeated in the wild but there's still samples of it stashed away in some secret laboratory somewhere. And so long as those samples remain, there's always the possibility it could break out back into the wild.
Because they're never getting rid of the idea. The only options are 1) Submit, or 2) Play Whac-a-muzzy for so long as they care to offer their heads to be smashed.
And even when they finally quit presenting their heads to be bashed in, never let your mallet out of your sight. Because eventually and invariably, they'll be coming for you again.
If there's a lesson to be learned from the last 1400 years of dealing with the Mohammedans, it's that.
How did you get so educated on Islam..you know your stuff.