The 14th amendment requires equal protection of citizens. The states cannot outlaw black people from engaging in Scientology, while allowing white people to do so. Cruishank made this pretty clear.
The first amendment to the Constitution prohibits Congress from abridging "the right of the people to assemble and to petition the government for a redress of grievances." This, like the other amendments proposed and adopted at the same time, was not intended to limit the powers of the State governments in respect to their own citizens, but to operate upon the National Government alone....For their protection in its enjoyment, therefore, the people must look to the States. The power for that purpose was originally placed there, and it has never been surrendered to the United States.