This is a school district not renting space at the school to a non-profit that intends to distribute the books. That’s a problem. The same thing happened to the after school Satan club. But framing it as “banning you from owning those books” doesn’t seem honest.
It’s plenty bad when publicly owned rental space is denied to some renters based on viewpoint discrimination. I hope they win their lawsuit. There’s no need to equate it with police raiding houses to confiscate books and arresting bookstore owners.