It's weird when people speak out against it so openly but then proceed to have no problem letting churches like the Catholics and other churches have their own internal law system that they enforce on their congregation.
Laws need to be rational and impartial for this reason. People are basing their civilization structure off a text of a civilization that doesn't exist anymore.
The Catholic Church does not have a system like Sharia. yes they have procedures and policies for things like annulment of marriage etc. but the Catholic Church does not have a legal system for day to day life so its bogus to even try to compare