Honestly, I don’t have time to write up my objections to the theology in your post, but I also don’t think my objections would be very helpful. Every flavour of Christianity has its own belief system; perfectly adapting your argument to my belief system wouldn’t necessarily help convince your family. Why not just talk to your family about their concerns first, and then if you discover something useful, you can post it on the forum to share with others?
Edit: To be clear, I don’t think all forms of superintelligence are necessarily anti-Christian, I just object to the theology in this post and think it is better fixed through an in-person conversation. The EA Forum is not the place to go to for theology advice!