Again, the same limitation that prohibits the federal government from inhibiting free exercise of religion also applies to speech. It would be a violation of the Constitution for the federal government to outlaw shouting "Fire!" in a crowded theater.
Please cite one of these federal laws.
What part of "Congress shall make no law" are you having difficulty with here? There is no federal prohibition against members of a masjid shouting jumma prayers every Friday from the rooftop with a bull horn. It is none of the federal government's business just as it isn't their business what Cobb County, Georgia puts in their history books about evolution or what some courthouse in Kentucky hangs on the wall.
@Hoodat They are state laws. In some cases city laws,with varying names. Maybe "disturbing the peace" in some cases,or just noise violations in others. One case that comes to mind was a pack of religious loons were haunting Stapleton Airport in Denver,and harassing travelers by "trying to save their souls". A court,which I THINK was a state court but COULD have been federal ruled they could visit the airport to hand out literature and talk to those interested,but could get no closer than 12 feet to people that wanted to be left alone. So there they were,at the airport the next day,with 12 foot poles.
I know of one fundie church in Denver that tried putting speakers in their belfry and blasting out hymns and sermons on Sunday,and they were shut down,too. Disturbing the peace.
ALL of these incidents have federal govenrment/Constitutional connections because of the "freedom of religion" aspect.