Actually, Glen, the US constitution applies directly to the federal government, not to the States themselves. Except in the case of the tenth amendment, which states that any power not directly granted to the federal government, nor prohibited to the states are granted to the states and then to the people.
The first amendment is specifically directed towards congress. Not towards private institutions. That's why it's illegal to yell "fire" in a private building when there's no fire, but not illegal to yell fire in a public location.
The first amendment:
Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances.
Note that it says that "Congress shall make no law"
There is no reference to the state government there OR private institutions.