If it is really an AGI it will have its own set of opinions. It would be quite ironic if the AGI ends up believing that humans are in the image of God, against its own "believers".
True, but the point is that they'd have a firm moral foundation for that opinion, as opposed to the secular position, which will be dubious either way, letting it play out in a culture war.
If you are asserring that only Christianity provides a firm moral foundation, I suspect people of many other faiths would disagree.