About the book promoting withcraft – aside from the fact that ‘promoting’ means actively involved in and so is misplaced here since the books were not meant to promote witchcraft – you could easily say that every book, movie, sport or game that protrays certain actions ‘promotes’ it and should be banned. So the argument is weak there. If we follow that line of reasoning we would ban everything from pro-wrestling to the Bible.

Your personal belief that Harry Potter “… is the promotion of witchcraft” should not infringe on the right of those who do or do not believe it does and still wish to read it.