[OneWingedShark]

Ask them about Jesus’ parable of the Prodigal Son—specifically that the Father declares that his dead son has come back to life. The son made the decision, while dead, and started back to his Father’s house without the father.
I’ve asked them to explain this parable in light of their views, but they have not been able to so far.

Good point; but there's another parable that can also be used. That of the Talents. If man does not have free will then the master, who represents God, cannot justly throw the last servant into outer darkness precisely because that man had no free will; of course in their world-view all mankind seems to be little more than remote-controlled robots.

Which brings us full circle to the parable of the prodigal son. God constantly/consistently paints Himself as a parent, particularly a father (though there are some references as a mother as well). But what sort of parent would be called good or loving that treated their [normal] child the same way at 40, or 20, or 15, or 10 as the did when he was an infant?
None would... and yet these folks would have us believe that God gives stones instead of bread, and snakes instead of fish, eternally treating His children as as infants, indeed as less than persons.

[Dutchboy88]

"But what sort of parent would be called good or loving that treated their [normal] child the same way at 40, or 20, or 15, or 10 as the did when he was an infant?

None would... and yet these folks would have us believe that God gives stones instead of bread, and snakes instead of fish, eternally treating His children as as infants, indeed as less than persons."

Most peculiar remarks. Do these have anything at all to do with our discussion about whether free will exists?