He's engaging in "projection." If it wasn't for his belief in the "loss of heaven and the pains of hell" he'd be pillaging and raping "to his heart's content." Such people are frightening in that they have no self control and do not believe others do either, and hence control must be imposed.
They have no control of their impulses and more base thoughts, and believe every one is just as weak, therefore guns must be outlawed, because they can be used at weak moments.
This guy has the same argument. He is a weak individual, who relies on his firm belief that there is hellfire and brimstone waiting for those who sin, as the reason that most (who are religious) do not sin.
Hint: the Lord does not hold one's hand guiding them along the straight and narrow. They are free to choose, regardless of their personal beliefs.