Explanation:

The insult of the liberated soul in this case meets a negligible punishment because this is the case of a strong devotee erring due to the inevitable human psychology. The same insult done to a liberated soul by an atheist or a demon is quite different. In this case God takes it more seriously than even the insult to Himself. For example, the insult done to Prahlada, a liberated soul, was taken more seriously by God, because Hiranyakashipu was not a devotee of God. Moreover, Hiranyakashipu continuously insulted Prahlada unlike a rare insult by Satyabhama. Both these cases are quite opposite and hence the insult of a liberated soul is considered to be negligible (when done by a devotee) as well as very serious (when done by atheist) depending on the context.