Islam is at once the most and the least interesting of the world's monotheisms. It builds upon its primitive Jewish and Christian predecessors, selecting a chunk here and a shard there, and thus if these fall, it partly falls also.
The lawgiver, of all beings, most owes the law allegiance. He of all men should behave as though the law compelled him. But it is the universal weakness of mankind that what we are given to administer we presently imagine we own.