I mean if you're comparing it to, say, raising your kid to be part of your religion then yes, this would be significantly worse. For starters if you raise your kid as part of your religion then presumably you believe it too, as do loads of others. In this clearly made up bait post, the parents don't beleive they're warlocks or witches or whatever or that magic exists.

Just the mocking alone is gonna fuck up the kid. At least with religion, a bunch of other people believe it, too

It's probably better because they aren't doing the "You are fundamentally bad and evil, all your natural impulses are wrong and must be controlled, your entire life must be dedicated to God, everyone outside of the church is 'of the world' and sinful, your thoughts can damn you to eternal torture" - thing. And at least when they tell her the truth, everyone she knows won't still believe it and cut her off for thinking differently. And at least there won't be millions of people who think she's wrong for walking away, making her question and have nightmares for years as to whether she is really the misled one and needs to go back.