Thats the point i am trying to make. When Kansas removed evolution out of curriculum, teachers still taught it because they couldn't get fired. Thats what tenure protects, that our education system is not affected by majority opinion and changes political climate. Now that Kansas has removed tenure, the next time the education board bans evolution which seems to happen every 5 years, teachers will have to comply or get fired.
And the point I'm trying to make is that curriculum choices at the K-12 level are a democratic decision, not a matter of personal conscience by educators. You don't get paid by the government to teach whatever you like, you get paid to teach what the government pays you to teach, and you're evaluated based on how well students know the material the government asks you to teach them.
Removing evolution from the curriculum is a political problem that voters need to solve. It's not something you can fix through teacher autonomy. The real issue is getting politicians and administrators to ask teachers to teach the right things, and it's their fault -- not teachers -- when the curriculum is bad.