Nor do I. And neither do the Courts. But the cases you are complaining about is the restriction on teachers, football coaches, etc. leading others in religious expression, whether they want it or not. And when those people are acting as agents of the state, using state property and a state microphone.
It's still a restriction on free exercise. No one is being forced to pray. Any student can just NOT PRAY. This whole idea of someone being OFFENDED by a prayer or rights infringed upon becuase people are being led in prayer around them is nonsensical and nauseating, particularly in view of the liberal license used in every other area of govt. school education. Moreover, it's tyranny of the lone protester. Also, you need to show how a govt. school teacher leading in prayer is tantamount to establishing a state religion. I don't see that connection and no common sense person does.