If they allow other teachers to keep books on their desk that are in support of LGBT stuff (Billy has 2 mommies or whatever), then they should allow this teacher to have his books on his desk. Otherwise, this is viewpoint discrimination.
I totally agree. Allow all personal-opinion books, or none of them.
But I don’t think that will stand up in court. And that’s because school boards are allowed to set the rules (discriminate) to a great extent. For example, they could put Marx’s writings in the school library, but forbid Hitler’s.
Even though both men caused equal amounts of damage to this world.