Do I think this is completely ridiculous? Yes.
Does that make it right? No.
I am a Protestant, I believe in Christ and the Christian theory of intelligent design. It is not my place to decide what others believe for them. If you want to believe that a flying spaghetti monster created the universe, then go ahead. If you want my opinion, I'll give it, if you want to hear wha I have to say on the subject, I'll tell you.
But if I think your religion is silly, then that's my own business until you ask me what I think.
The school had no right to suspend him for dressing in religious attire, no matter what they thought of his beliefs.