If we take his letter at face value, he is a self-satisfied, supercilious lout who doesn't know the difference between "their" and "there," and who is upset that a newly-engaged school board insists on independent measurement of performance rather than cozy "cohesiveness."
"Cohesiveness" between the union and the school board is just another word for cronyism. He laments that they're no longer the top performing school district in the state. Yet the performance level of the teachers has not declined. They are simply being measured by a true yardstick instead of by "cohesiveness" with those tasked to evaluate them.