Umm, someone forgot to tell this jackass and his inbred accomplices that the Marine Corps is not afraid of a few dipshits with automatic weapons.
A bombing would certainly suck, but the Sergeant of the Guard and his trained killers at the gate are not at all intimidated by crazed jihadists ridin' dirty.
Considering that most of these Marines spent multiple seven month tours wandering a desert actively hunting the most dangerous jihadis the world has to offer, a daring but futile attack may actually break up the boredom.
"You might not believe it but under fire Animal Mother is one of the finest human beings in the world. All he needs is someone to throw hand grenades at him for the rest of his life." - Full Metal Jacket