How did it violate his religious beliefs? I can see where he might disagree with it, but disagreeing with something is very different than having your rights violated.
I'm wondering, why in the world anyone is required to attend? Public schools have become clearing houses for correct LIBERAL political thought.
I think that this so-called diversity training establishes the PC atmosphere which outlines correct, acceptable talk and defines many topics as off limits. It is conducted during freshman orientation and is obligatory. I have seen the influence on my own children, (now 30) who shush any mention of religion, for instance.