The whole business is built on ego, vanity, self-satisfaction, and it's total crap to pretend it's not.
When you say Sharia, even to a Muslim, it's understood in vastly different ways, in many ways it's part of an identity and most Muslims when they talk about wanting Sharia to play a role in their lives really mean it in so far as it talks about family law, you know, issues like, as I said marriage, divorce.