Just put the 10 commandments up, wait for political change and then sue the hell out of everyone.

I know that acts of rebellion won't be a thing because no one wants to lose their jobs. Simply put your 10 commandments up. You've likely already told the Principal or someone else in your school that you don't want to but are being forced. Keep a record of those conversations. Wait for the 4 years to be over, and sue the living hell out of anyone who threatened you, forced you to do it, etc. Keep any letters that said you have to do it etc.

Eventually when the mob is out of the office, you'll be able to use the court systems again to say your rights were taken away by force and under threat and then you retire your ass to an island.