How would ridiculing anything be an appropriate topic of a valedictory address?
Whether I agree with him or not, under those circumstances, this average Monkey would want to hear what the little Monkey believes in.
(My bold)
In the case @ hand, the student had stepped out of his persona as valedictorian. He'd donned the garb of believer. That's the problem.
The only reason the school district can insist on preapproving scripts from their podium, @ their graduation ceremony, in their building (presumably), is to prevent inappropriate remarks. As their legal counsel probably advised them, under the "barrage" of requests (?), complaints (?) from atheists (really? Are there that many in the Carolinas? Good on them!) - it was unwise to throw the podium open to inspiration by the Holy Spirit, or whatever the student claimed after the fact.
That's the issue - worst comes to worst, they could have killed power to the microphone/amplifier, & killed the lights & the AC, for that matter. The school board's problem - if any students/parents drag the district to court over this question - will be for the board to prove that they did everything in their power to prevent the disruption of the graduation ceremony. From what I see here, the board failed.