Apparently the Muslim community in England is running a campaign to make Sharia law the primary law for Muslims in England. They would be held accountable only to the Sharia court, and not the British court. Basically, two separate, and unequal, legal systems. I know there is opposition, but I believe there is some support for making Muslims subject to BOTH sets of laws. This would allow the Sharia courts to prevent Muslims from leaving the faith, for example.
In the US, at least, all religious organizations are tax-free. Even those businesses and properties they own which are not strictly connected to religious activity are still exempt from taxation.True. The medieval church was tax-free, and it was a terrible rival to other buisnesses.