Bunk! Santa Claus, Easter Bunny, Tooth Fairy, Mother Goose Stories, Grim Brothers--ALL FANTASY, and not one child's pyschological progress ever injured!
Harry Potter is very low quality compared to the clsassics you cite
Plus the visual imagery of Harry Potter movies is a powerful brainwashing agent. Much more powerful than ye old Grimm's fairy tales book. And not for good but for magic and paganism. You either believe in God or you don't and you expose your child to God or you don't
Magic and paganism are also evident in all of JRR Tolkien's "Rings" series yet they are considered by some to be classis...how would you rate them?