Yeah, on 9/12/2001 we really were having a national discussion on Salafism and Wahabism compared to other theological schools in the Muslim world. < /sarc>
It was originally formulated as a combination religion, culture, government and set of laws.
Given the conditions of life at the time it probably was rather progressive, but then they FROZE their laws about 1000 AD.
The civil and criminal code associated with Islam in the Sharia has not changed in a millenium!
I think it's quite reasonable to regulate Islam in this, or any other country, like we might regulate a foreign business ~ and at the same time simply leave the religious part untouched.