I grew up in a very New Agey-type place. Lots of Wiccans, crystal users, blah blah. They weren’t nearly as dangerous as the secularists, in my opinion, because most New Age types are pretty live-and-let-live (at least where I grew up) whereas secularists want to quash any belief in God.
Any worldview that isn’t a Christian worldview is, ultimately, evil and will lead us to Hell. This includes Wicca, Hinduism, Buddhism, Islam, Jainism, modern Judaism, atheism, and agnosticism. Parents certainly have the right to choose how their children will be exposed to such things, but I would caution against trying to wall off the world; especially in these days of internet connectivity, kids will eventually find all sorts of things and may make their own friends with objectionable views when they grow up.