Frankly I don’t understand how people with access to the rituals, writings, scripture etc of such a complex religion end up with a worldview of “Thing I like -

Frankly I don’t understand how people with access to the rituals, writings, scripture etc of such a complex religion end up with a worldview of “Thing I like - God. Thing I don’t like - devil”. A typical toddler or infant will probably arrive at a similar morality unaided by such powerful structures I would think.