If its isis then level an isis city. Give 12 hours to leave. plain and simple.
What??? And ruin the surprise???
No. There’s a new sheriff in town. NO warning, just level a city. Completely. Raze it until you are bombing sand. No statements, nothing.
The next attack, do the same. Utterly erase another moon-worshipping heathen’s mass abode.
Rinse and repeat. If it happens a FOURTH time, eliminate Mecca AND Medina completely and simultaneously, with multiple nukes.
No need to explain, they will get the message.
The only language understood by primitives is strength. Playing nice merely encourages them. Erasing the very thing they worship *MIGHT* let them know that we’re not playing nice anymore, since they cannot.