He didn't put enough points into his charisma stat to be able to bluff that hard.I think he just thinks he can bluff his way through life. If you threaten someone with G*D on your side you'll win every time without even doing anything.
Poor boy watched way too many of those shitty Christian children's shows.
So he's just going to continue arguing and bluffing his way through everything. He knows he's all bark and no bite, he just hopes you're stupider than him. No a very solid gamble, gotta admit.