Dear Christian People, of whom I am still marginally one,
When you meet a person who was raised as a Christian and has decided to explore alternative spirituality, this is usually an indication that the flavor of Christianity they were raised in no longer meets their spiritual needs. This can happen for a variety of reasons. Maybe their flavor of church let them down. Maybe they witnessed some illegal and/or immoral activity by members in good standing (see Peter Popoff, the Catholic Priest sexual abuse scandals, and anything involving Benny Hinn) or maybe they just aren't getting "fed" and want more, and because their flavor of Christianity said certain things are evil bad and wrong, even if the Bible makes NO MENTION OF THESE PRACTICES AT ALL, they've decided that it's better to be evil-bad than to go hungry.
You deal with these people by being as understanding as you possibly can, and by trusting that God is 1. In charge and 2. knows what he's doing. C.S. Lewis was both an occultist AND an athiest, by his own admission, because he got screwed over in his early years by. He equates his re-conversion to being "dragged kicking and screaming through the front gate". Sometimes you have to go through the wilderness, and sometimes it takes a really long time.
For God's sake, the last thing you should do is SCREAM AT THEM. They're at an extremely fragile point in their spiritual development. DO NOT KICK THEM WHEN THEY ARE DOWN. Be kind, be sweet, be understanding. Open a dialogue with them. Discuss belief systems, why they've chosen the path they're walking and the nature of prayer vs. magic. You might be surprised by what you find. Don't bash their tarot cards. If you really want to get brownie points, learn what Tarot cards are. Talk to them about the Christian themes involved in Death, the Tower, the Sun and Judgment and the value of symbolism and Jungian psychology. Offer to play the actual game of Tarot with somebody's spare Rider-Waite. Hell, buy them the Jesus Deck. It's 52 cards, not 78, but it's awesome, and an awesome witnessing tool.
Accept that they're not going to see "witchcraft" as evil. Just accept it. I know it's hard. I know this comes as a HUGE SURPRISE to some of you, but they don't believe in the same things you do. Telling someone who no longer believes in hell that they're going to go to hell is not EVER going to be effective.
Realize that the knife they've got sitting on their alter is called an atheme, and is not the implement they're going to use to slaughter kittens.
"Wicca" is a specific religion. Do not use it as a blanket term for paganism. It just makes the pagans laugh and proves you don't know what you're talking about.
Do not get your information about their chosen path from Jack Chick tracts. In the name of Jesus God, do not get your information from Jack Chick ANYTHING. Not only is he inaccurate as FUCK, but half those tracts are based on books (books HE PUBLISHED, no less) that Christian watchdogs discredited when the Satanic Panic hit. Because these books STARTED the Satanic Panic, and the Christians who still had their brains installed realized the weight of bullshit they were wallowing under.
There's that part in the Bible that goes, "For God has not given us a spirit of fear, but of Power and of Love and of a Sound Mind." If you are screaming at someone, and if their religious beliefs scare you worse than combat, YOU ARE NOT GETTING VISITED BY CHRIST. Because "by their fruits you shall know them" and all that jazz. Be kind, be courteous, be gentle. Show that you are Christ-like by your actions, and that means comfort, love and teaching. The only time he ever got pissed was when HIS OWN PEOPLE were screwing up.
Thank you all for completely ruining my day. God bless.