Exactly. Reason enough why all members of this organization must be denied entry to the country.
Most Muslim-majority countries incorporate sharia at some level in their legal framework, with many calling it the highest law or the source of law of the land in their constitution.
Application of Islamic law by country
Wouldn't some of these countries be the targets for denying entrance to the USA which has a unique Constitution of self-governance? Trump is going to be wading into a trap here, what with PC running this country in 2016 and force fed to every student of public education in America.