Christianity is polytheistic in most of its common forms. The bulk of denominations recognise the Trinity and most revere Mary. Even the Presbyterian Church I grew up in was forced to give some due respect to Saints, who in the Catholic Church are minor deities with considerable influence in their particular fields.

Besides, the Dying and Rising King, sacrificed with a spear-thrust whilst neither on Earth nor in Heaven, neither clothed nor naked, neither feasting nor fasting, absolutely screams Mediterranean Vegetation Cult. Poor old Judas spilling his guts out in an open field only confirms this. Paul was trying to set up a mystery cult which would make him large chunks of dosh!