If belief in God is more like belief in other persons than belief in atoms, then the trust that is appropriate to persons will be appropriate to God. We cannot and should not arbitrarily insist that the scientific method is appropriate to every kind of human practice. With or Without Evidence I haven't said that belief in God could not be based on evidence or argument. Indeed, I am inclined to think that the theistic arguments do provide some non-coercive, evidence of God's existence. By non-coercive, I mean that the theistic arguments aren't of such power and illumination that they should be expected to persuade all rational creatures.
Rational people can rationally reject the theistic proofs.
Nonetheless, I believe that someone could rationally believe in God on the basis of theistic arguments, but no one must. I also believe, like Calvin, that the natural knowledge of himself that God has implanted within us has been overlaid by sin. Redemption includes the gradual removal of the effects of sin on our minds. Attention to theistic arguments might do that. The primary obstacle to belief in God is moral rather than intellectual.