Board Thread:General Discussion/@comment-26687285-20151003201110/@comment-26917787-20151004164205

Another religious reference: Ultron is confronted by Stark in the Sokovian church, and he questions if Stark had come to confess his sins.

I think Ultron believes that he IS God, or if not, that he is some divine angel sent to cleanse the Earth. His attempt to build a "perfect" body reflects this, as he tried to elevate himself to a powerful, omnipotent being with no flaws. Furthermore, he tried to cause a mass extinction event to rid the world of "evil" as God had in the Bible, Ultron's Meteor vs The Great Flood. I think the overall message Whedon meant for us is that religion can drive people to commit violent acts, believing they are carrying out "the will of God", as seen with the Crusaders or organizations like ISIS.