Orthodox Christianity rejected it as a heresy 1700 years ago.
It was a Persian idea - influenced by Zoroastrianism - and it is in direct conflict with the fundamental principles of Christianity.
Are you getting paid extra for using big (i.e., pretentious) words?
Just wondering...
But I always find it amazing that people who spend so much of their time studying the Bible know so little about Christianity.
The idea that the earth is a battleground between good and evil, with God on one side and Satan on the other, is not a Christian one - it is a pagan idea that Christianity rejected long ago.
Harry Potter may have paganist undertones, but the anti-witchcraft rants have paganist undertones as well.