J.O.
So you guys read fairy tales that help young children see that good prevails over bad. He is more likely working out that he does like the way some things are being done at school right now all children go through periods of of being "really good" at school and time where defiance is in the forecast. You don't really have blame anyone but remind him that at school we listen to the teachers and speak with kind words or whatever you say to get that message across. Good luck and keep reading all different kinds of stories.
J.