Yes, most of humanity on this planet has no idea about it's supernatural elements, no, the church is just church to most people, but behind the scenes they are the driving force behind the system in place to track and control the supernatural elements. He only takes two trips back to the origin world, where the kid was born, and the second one will leave him stranded there for a while with the boy. Like any child raised by a strong willed parental figure, I'd say the boy has a strong possibility of mimicking him to a degree, but to each their own and the boy is his own person. 

Check, big house, rich family, perfect set-up for some later drama :P