They don't worship "the devil".
I know how you Christians embrace this idea that unless you believe in baby jesus, you are worhipping the devil. That's the kind of ignorant intolerance that fueled the Salem witch trials, the Inquisition, and other Christ-sponsored atrocities.
Wiccans don't even recognize the devil, or any other incarnation of malevolent fairy tales.
From the Judeo-Christian viewpoint, any honor given to a "god" other than the one who revealed Himself to the Israelites is honor given to the Devil and his minions.
Well, first you do not know me. Second, I do not worship baby Jesus. The God I worship is not a baby.
As I said, I have known these people....have you?