I know you're trying to play devil's advocate in this, but you can't deny that the 'free will' arguement is paraded time and time again by religious minds in order to justify why things are the way they are.
When you put it in context, it's a really odd point to raise and actually creates a paradox; monotheistic religions have gods that have omnipotence and infalibility, therefore time is preordained and all future actions/ choices are preordained. Where does free will fit into that equation? It doesn't.
In the context of my quote, it was stated that no one is born evil and that they choose to become so later in life (i.e, free will). If you believe this, how can a person believe in an omnipotent being?
Even with this glaring paradox, the old 'free will' chestnut is paraded as a reason why something else does exist, when it clearly does not if you believe in an all-powerful and all-knowing supernatural being.
But most religions (outside of the abrahamic ones) don't believe in an all powerful and all knowing supernatural being...