Religion

They view the god as God and the Goddess as Mary. This is not Wicca, in Wicca the God and Goddess have specific names, specific functions, and represent very specific things which the Christian deities do not encapsulate.

well you could be Christian Wicca, but like Brysing pointed out, they are two different religions, like saying your a Hindu Muslim. personally it doesn't bother me, but the correct term would probably be Christian Witchcraft, but since 'witchcraft' not only sounds evil, but is a no-no in Christianity, 'Christian Wicca' sounds more peaceful, friendly and nice. [kind of like having your cake and eating it too] if you're happy with your path i don't care, Christian Wicca doesn't bother me, but it's two separate religions people have smashed together, Witchcraft is the practice and therefore the correct term. but, again, if it works for you go for it.

if you're Christian, do some soul searching, perhaps ask your minister/reverend/priest about the situation and get their input. make sure you are doing this for the right reasons and not because Wicca/Pagans/occult seems cool.