Catholic people will make catholic laws. They wont literally be catholic laws.. but common sense would allow you to see them as such. There's nothing wrong with that either. The state does not need to recognize them as catholic laws and requires the laws be articulated and produced independent of the religion.
you cannot make a law that says "You must treat the poor the way Jesus would" but you can make a law that says "You cannot refuse life saving medical treatment to someone for being poor". Under Separation of Church a State can still create their set of laws to be 1:1 with the teachings of their religion. They just have to actually do that.. make the set of laws. they cant say "follow rules in the bible". The laws supersede the bible. Make the laws match the bible if you want people to follow the bible. So that's what these states are doing.