I agree you should be able to read whatever you want. And NOT read whatever you want, without being labeled a fundamentalist like an Islamic fundamentalist.
But...we also did not do the Santa thing, nor the Easter Bunny, in our house. Didn’t bother the kids not to make believe those things.
There is a difference betwee reading fantasy and reading fantasy that is put forth by many as having a Christian message when it doesn’t. I wouldn’t even say LOTR is a Christian allegory, nor Lion the Witch and the Wardrobe, although it seems closer.
J.K. Rowling has long described herself as Christian so I take her at her word ... I believe she is a member of the Church of Scotland (Presbyterian). The tales she writes about are essentially good versus evil (the message of ALL religion) and I see no harm in the fantasy. I do, however, see harm in practically all fundamental religious philosophy as, IMO, it gave rise to the Dark Ages of history, the Inquisition, witch burnings, and modern-day lunatics such as the Reverends Ike, Phelps, Jim Jones, David Koresh, racists such as Louis Farrakhan, Jeremiah Wright and groups like Al Qaeda and Hammas. If we all had been following fundamental preaching, we would be stoning to death those committing adultery and what we believe to be blasphemy instead of the "love thy neighbor" principles of Jesus Christ.