So far the terrorists are certainly winning as the individuals at the wrong end of the received terrorist threat-made-actual will testify. Given that negotiatio

So far the terrorists are certainly winning as the individuals at the wrong end of the received terrorist threat-made-actual will testify. Given that negotiation with ISIS is not on the table (nothing to negotiate unless you call submission a negotiating point) what would be the recommendation for the West to remedy the situation? Currently many Europeans are getting used to armed guards at churches and synagogues, crowded places and other strategic points; I wonder what would cause this situation to be different in say, ten years time?