Islam is a religion, a political system, and a legal system. These three Muslim domains are intertwined and inseparable.
Plaintiffs repeatedly argue that Muslims require a Sharia legal system in order to practice their religion. American law cannot incorporate a Sharia legal system into its jurisprudence since doing so would also incorporate Islamic political and religious tenants into its constitutional common law. This would plainly violate the Establishment Clause of the Constitution.
Therefore this claim pleads for an unconstitutional remedy on its face and should be denied.