The OP is correct, if you're not the person that sets the narratives by shaping his values, beliefs and character then the poisoned wider society will do that job for you to devastating effects.
When these scientific materialist, anti-humanists, irrationalists, satanists, closet white supremacists get a hold off him, it's game over, he will inadvertently serve his oppressors, argue in favour of them against his own
He will suffer from intense self-hatred and even take up their religious beliefs as you can see with many of the sspot users on here, indoctrination is a powerful thing and humans in general are screwed once this happens.