We can only defeat them by surrendering! Everybody knows that!
By some convoluted logic from a parallel universe, this strategery might work. But back here in the real world, killing the enemy is a very good way of stopping continued assaults and deadly engagements once and for all. These people shall NEVER be reformed, so the proper and fully justified course of action is to remove them from the gene pool.
If there is a little collateral damage incurred that happens to take some “moderate” Muslims in the close vicinity, then the lesson is doubly reinforced - “moderate” Muslims must in no circumstances willingly be anywhere near the Jihadists.