Astronuc said:
She had been warned, and she simply ignored the officials (which shows contempt for others who do not believe the same way), and delivered her message. She abused the privilege given to her - which in itself is rather hypocritical.
To be complete, she had been warned, asked for justification for the decision, received an ambiguous response (the reason was ambiguous, not how the school would respond), and then decided to ignore the officials.
The issue is whether the school had the right to censor the speech in the first place based solely on religious reasons and whether the school even followed national guidelines.
When it comes to the content of graduation speeches, the school has to be religiously neutral. That means the school shouldn't use the religious content (or lack of religious content) as the reason for prohibiting or censoring a graduation speech - it doesn't mean the speech has to be religiously neutral.
Of course, that is just my interpretation of a 'guideline' that is really just a long case history of numerous lawsuits that have occurred nationally. While school districts are required to have guidelines on what they have to avoid or what they have to allow, it's kind of hard to avoid being ambiguous when policy is based on court cases. If the cases avoid conflicting with each other, they only do so because the cases are decided on some fine point of law vs a defining principle that someone could base a policy on.
The Department of Education gives some guidance:
Prayer at Graduation
School officials may not mandate or organize prayer at graduation or select speakers for such events in a manner that favors religious speech such as prayer. Where students or other private graduation speakers are selected on the basis of genuinely neutral, evenhanded criteria and retain primary control over the content of their expression, however, that expression is not attributable to the school and therefore may not be restricted because of its religious (or anti-religious) content. To avoid any mistaken perception that a school endorses student or other private speech that is not in fact attributable to the school, school officials may make appropriate, neutral disclaimers to clarify that such speech (whether religious or nonreligious) is the speaker’s and not the school’s.
That's easy for the Department of Education to say, but lawyers for individual school districts are more interested in finding a path through a mine field of lawsuits.
In general, schools can't actively promote school prayer at a graduation. That would include having a school official lead the prayer, arranging for some outside speaker to lead the graduation prayer, selecting a student to lead a school prayer. Schools also need to avoid giving the impression of endorsing religion by allowing religious content in graduation speeches while prohibiting other topics (i.e - the school can't get around the rules by only selecting speakers who they know will include religious content). It also includes putting the issue of school prayer up to majority vote by the students. Schools may think they're avoiding playing an active role by letting the students decide, but they're playing an active role in the process by holding the vote in the first place.
Schools also have to ensure they don't violate the First Amendment rights of their students or their community. They can't censor or prohibit a graduation speech or decide against a particular speaker solely because of the religious content of the person's speech. They also can't put the issue of who could lead a school prayer up to majority vote (the school gets slammed on both sides for this one, since the majority vote ensures religions in the minority never get expressed - hence a violation of the First Amendment rights of students in a minority religion). The school also can't bar religious organizations from using school facilities after hours if the school makes the facilities open to other community groups.
The only leg the school has to stand on is that they may require the student to delete content that falls outside the scope of the purpose for the presentation. I haven't seen a transcript of the speech, but if she is crediting religion for motivating her to be successful, the school is going to have a hard time saying the content falls outside the scope of the purpose. In fact, so far, it seems news articles all quote the same single sentence that occurred immediately prior to the microphone being cut off, but also say there were other religious references in the speech. A single sentence isn't a religious 'sermon' and 'other references' is pretty ambiguous.
I also like the part where schools can "make appropriate, neutral disclaimers". If the school isn't careful, they can get themselves in trouble with their disclaimers, as well. They really are walking through a minefield when it comes to religion, but they stepped on one of the mines in this case.