[Modernman]

Modern laws prohibit discrimination due to religion, ergo you cannot form a community based on religion.

There is nothing preventing a group of people from buying a tract of land and setting up a community based on religion. However, I think you're talking about setting up a governmental entity based on religion, which is not Constitutionally permitted.

Further, if one person comes in and decides to flaunt the law by wearing a t-shirt with some obscene comment on it, the ACLU will jump in to try to get any laws against it declared unconstitutional - an infringement on his free speech.

You have every right to limit speech on your own private property. The Constitution does not give me a right to say whatever I want in your living room. However, if we are talking about public, rather than private, property, then the Constitution protects my free speech rights and trumps any local ordinances to the contrary.

[unlearner]

"setting up a governmental entity based on religion... is not Constitutionally permitted"

The Constitution prohibits Congress from creating a federal religion. The states are subject to their own Constitutions. Most states, if not all, guarantee freedom of religious expression without bias toward a particular sectarian set of views.

However, this nation was formed by people who were first and foremost seeking to practice their religious beliefs as communities, without fear of religious persecution by the government. Today, this is impossible.

"Constitution protects my free speech rights and trumps any local ordinances to the contrary."

True, as long as we recognize that speech is speech, and things like obscenity, indecency, slander, libel and the like are not protected. Freedom of speech does not grant a right to make everyone listen.