I think it's because that the very fact she was trying to teach/abuse him into memorising a religious text, seems to point in that direction.

I think it's doubtful this scenario would have played out, if the text she had wanted him to learn was "Three blind mice".

As Steven Weinberg said, "With or without religion, you would have good people doing good things and evil people doing evil things. But for good people to do evil things, that takes religion."