Faith is integral to the scientific method even. The idea that faith is an inherently bad thing is something that came out of the destructive nihilistic worldview defines our age. A nihilistic worldview that fundamentally comes from a denial of absolute truth.
And just as there are many people who culturally identify with a religious group but don't understand their faith, so there are a many who do not truly believe there is no absolute truth while they identify with that which spawned from nihilism.
As God is The Ultimate Reality, and atheism is the rejection of God, atheism is fundamentally rooted in nihilism. If there is no God, that makes me god! And indeed, Satanists understand this and embrace it.
It is folly.