Whether the unbelief of pagans or heathens is graver than other kinds?

Objections

Objection 1 : It would seem that the unbelief of heathens or pagans is graver than other kinds. For just as bodily disease is graver according as it endangers the health of a more important member of the body, so does sin appear to be graver, according as it is opposed to that which holds a more important place in virtue. Now that which is most important in faith, is belief in the unity of God, from which the heathens deviate by believing in many gods. Therefore their unbelief is the gravest of all.
Objection 2 : Further, among heresies, the more detestable are those which contradict the truth of faith in more numerous and more important points: thus, the heresy of Arius, who severed the Godhead, was more detestable than that of Nestorius who severed the humanity of Christ from the Person of God the Son. Now the heathens deny the faith in more numerous and more important points than Jews and heretics; since they do not accept the faith at all. Therefore their unbelief is the gravest.
Objection 3 : Further, every good diminishes evil. Now there is some good in the Jews, since they believe in the Old Testament as being from God, and there is some good in heretics, since they venerate the New Testament. Therefore they sin less grievously than heathens, who receive neither Testament.