But about your comment that it "wasn't the smartest way to go about it", I would suggest that if his goal was not only to rescue his own son from evil, but to also bring national attention to the wickedness of the public school agenda and to alert other parents to the clear and present danger therein, then he did the right thing.
While being arrested and having a criminal record is an unpleasant thing to experience, it is sometimes justified and I would suspect that the Lord's judgment in this matter would bless this man's conduct.
--Boot Hill
Seriously, upholding merely human laws should be generally encouraged, but upholding God's moral Law is an obligation which everyone must adhere to. Whether putting on a scene at the school was justified or not is open to question, though, and we'll have to leave it to his conscience, which is a higher arbiter of right and wrong than any merely human law.