This discussion is able to take place because of the 1st Right. As a few have correctly said it is Congress (the lawmakers) who are constrained to not make laws about religious exercise. It is also therefore within the authority of any private (nongovernmental) institution to make its own rules about whether or not people can pray, have signs etc. If the people do not like the institutional rules they can go somewhere else. The problem here is that the kids are forced to go to government schools. Therefore the government schools should definitely NOT make any rules regarding religious expression as long as no physical damage is done to anyone. As Thomas Jefferson said: as long as it does not break my bones or pick my pocket. In this case of the cheerleaders, no harm was done to anyone until the government school officials forced their religious beliefs on the cheerleaders by banning them from expressing their religious beliefs. The law was broken by the school officials not the cheerleaders.