I am interested in philosophy of religion (and a former catholic too) which is why i am here and i focus on Shi’a Islam. There is actually a legitimate debate going on in the roots of the community about this very issue.
Many believe Islamic law will be imperfectly and invalidly applied in the absence of a infallible Imam. The last Imam disappeared (but not died, he is waiting for the right time to reappear) in the 7th century. We can’t replace him since he isn’t dead but he isn’t present to rule on law either [
en.wikipedia.org/wiki/The_Twelve_Imams]](
http://en.wikipedia.org/wiki/The_Twelve_Imams]).
I think it’s a very interesting point though. It sheds some light on the separation of church and state and why we might need it. I’m sure you can fathom many reasons why you would advocate separation of church and state if you were a catholic in a Muslim country (even though they are religiously obligated to protect you as a Christian).
I think the degree of separation is more important than the question of separation itself. I’m sure few of us want to see such a strong and overt intertwining of Church and State like in certain Islamic jurisdictions. Some of the bad things done on the auspices of the Holy Roman Empire and nominally, the church, remind us the church being the state might not be the best thing either.
One of the key things is probably the protection of people who don’t belong to the church. Zoroastrians are horrible discriminated against in Iran and unlike Christians and Jews, there is no religious obligation towards them.
As an atheist, i wouldn’t like living under a state where laws are derived a strictly biblical basis. I’m sure the reasons for that are obvious. Just like you as a Christian might not like the prohibition on preaching in Saudi Arabia, which isn’t really based on any separate logical reasoning (maybe a Machiavellian one) but on the sole fact their book told them too. If you feel an aversion toward that, you might understand why others would not want to live under a state like that.