>So why tell the world about what this elite unit is going to do? <
It gets them moving. In order to move, they have to communicate. It exposes them.
These savages aren’t that bright. On the other hand, their leaders are smart. They’re living the life of leisure in Doha while the savages carry out the jihad.
EC
It also lets the public know that the authorities need every bit of info and video that anyone, anywhere, has that can reveal faces, details, whereabouts, timelines, actions, etc.
Joshua 9:1-2
1 Now when all the kings west of the Jordan heard about these things—the kings in the hill country, in the western foothills, and along the entire coast of the Mediterranean Sea as far as Lebanon (the kings of the Hittites, Amorites, Canaanites, Perizzites, Hivites and Jebusites)
2 they came together to wage war against Joshua and Israel.