You're kidding me, right? You have to be kidding. The occult? Come on. They're cartoon characters. They're not even that scary. Captain Hook is harmless and Ursula is so cartoonish she's practically the embodiment of camp. How about you let your children live a little? Don't coddle them so much. Expose them to new things, new facets of life (even if those facets are a tad unsettling). Let them ride 'Snow White's Scary Adventures' or meet Cruella de Vil, and if they don't like the experience, guess what? They don't have to do it again. Believe me, they'll live. But at least give them the opportunity to experience something different or unfamiliar before condeming it as witchcraft and paganism. Jeez! If people with your old-fashioned sensibilities were running Disney World, there would be less variety in the parks than there already is:
"So long, Pirates of the Caribbean! Sayonara, Haunted Mansion. Those attractions were just far too pagan. We didn't want our guests stepping off those attractions with a sudden hankering for drinking chicken blood and wearing Pentagram necklaces. No, Disney World will be a much better place if every park is dedicated to harmless, banal princes and princesses."
Oh, and there are plenty of good Disney characters who practice versions of the sinful occult that you're so fiercely opposed to (Mama Odie--"Princess and the Frog", Mushu--"Mulan", the various fairies).