Colonial knowledge of the Cylon God is spotty, consisting of bits and pieces gained during brief conversations with the human models encountered to date. The Cylons believe in a single God that created humanity. They also claim that humanity is flawed and undeserving of God’s love, so God influenced humanity to create the Cylons as a replacement. By wiping out the human race, the Cylons are fulfilling God’s plan. To hear them tell it, the Cylon God loves all and asks only for love in return, yet he punishes and destroys when that love is denied.
They believe that God is impartial yet he’s capable of such righteous hate that he guided the Cylons to annihilate billions. It’s clear the Cylons detest the colonial faith. They believe the colonial gods are false idols and that humanity is ignoring a dark, sinful past on Kobol. Oddly enough, they show a keen interest in the Sacred Scrolls and seem to recognize the cycle of time. They want to know more about the Thirteenth Tribe. Might only be an effort to track down more humans to kill.