My thoughts exactly. Anty reason why we don't use it? Seems like a perfect place to drop it on a large Islamic crowd chanting for America's death, plus them robes that they wear and don't wash would make for even better fuel.
Because we don't use it any more, and likely have no stocks of it. We do have Fuel Air Explosives(FAEs), Pave Pat Blue (Daisy Cutter), and MOAB (Mother Of All Bombs ... well not really but it is a cathy name, no?) We've also got AC-130s, that would make a mess of that mob in short order.