let's see here.
first off, if you're on a series of 1 year deals, and you are allowed to serve out this year, you aren't necessarily owed next year. you're not fired unless they end it early and send you out the door with a box. you're not renewed. which an OR school can probably do for cause or even without cause if by a deadline as i understand it. so which was it?
second, the article says he got crossways with a prominent portland AD who kept notes and passed them back to lake oswego.
third, the article says the portland AD said issues extended beyond the letter to confronting the athlete and riling fans up against her at state.
fourth, his school may have some sort of policy where letters like this need to be signed off on by the principal or AD. this isn't just joe public making free speech, it could be understood as representing the school. but it sounds like their own school has trans athletes and his position may not be the school's position. if i don't follow company policy and advocate my personal beliefs i too could get crossways with my boss. what does lake oswego think of such things?
fifth, did you folks miss the part where parks said, "I had 2 transgender athletes on my team this spring?" setting aside the hypocrisy problem -- as i have said, this seems to be more about the ones who win than about purity -- i could see where administration might view him as no longer the appropriate steward for a team composed that way.
sixth, if you line up the dates -- the letter goes out before state, not after. that reads different. you then make a scene at state.