Shariah is a totalitarian legal-military-political system that is designed to control every aspect of an individual's life and is antithetical to our concept of freedom and democracy.
Moosa might have added that shariah is an all-encompassing Islamic doctrine and system that includes legal, military, political, and social normative dictates by which Muslims everywhere and for all time are commanded to live their lives.
Yet as recent incidents and reports make clear, it's a particularly intractable problem in the military, with its enduring macho culture and unique legalsystem.