For parents to object to books proclaiming gay as good, need not be be religious people. You need to realize that not being religious does not mean a person is for every thing goes in the world.
The question is if a community decides a book should not be brought into a schools library system is that banning?????
I know many schools in the US have moved to remove Huck Finn from the shelves because of the language used in it. The argument that the terms used within its pages were the vernacular of the time. Still moves have been made to ban it.