No you are pretty much wrong on several accounts. If a group of Jewsih students were feeling ostracized, or a group of Muslim students were feeling left out, and that group of students went before the Board of Education and asked for either permission to voice a prayer, or for it to cease, I would side with them. That is not what is happeneing here. Mr. Green has no real concern with separation of church and state, what a joke, and you are a fool if you believe that as well. The man does not attend school there, nor does he supposedly have children there. He is being what I grew up to know as a "troublemaker". He wishes to use the power of the courts to stop something that he does not agree with, and feels threatened by.
Atheists, humanists, or whatevers you chose to call yourselves this week, think they know what is best for everyone. Let the students at the school decide, within reason, what they wish to do before their ball game. It is their school and their event. Just because you have no faith does not mean that someone else should share your loss.
And no real Christian who knows God and loves God would condone the ceasing of a voluntary public prayer. To do so is to bow down to pressure from those who think they know what is best for everyone else. At the same time they know that God will hear the whisper as well as the outspoken prayer. But God thru Jesus instructed those who would deny him, he would deny also.