The nub of things.

"The figure of the tortured and executed Jesus is the overthrowing of the Satanic image of God (oppressor, judge, accuser), for God as friend, lover, victim, counsel for the defence, fellow accused and flayed flesh and blood. It replaces the Satanic God not with humanity at its most triumphant, as rationalist humanism does, but with humanity at its most torn and vulnerable". Terry Eagleton.

Really worth reading: Humanism and Christ.