Well I do study US military and with one Spooky, the entire attack could have been stopped. Probably too late for the Ambassador, but the people there (at the embassy) attacking wouldn't have had the opportunity to go hide. They can in fact precisely take a target and not "level an entire town" with that platform.
But to tell you the truth, I probably would have been ok with the leveling of an entire town in order to protect even one of our ambassadors. That was an attack on sovereign territory just as all British embassies are British territory.