Premanand Maharaj Ji
Why should I bear it when someone insults me publicly for no fault of mine?
Insult can cleanse past karma
If you are spiritual, bear the insult and pray that the other person's intellect becomes pure. The mental burning you feel can settle a past sin, so you do not have to bear bodily punishment.
When someone abuses or humiliates us, we feel a mental burning. That burning becomes atonement for our sin, so we do not have to suffer physical punishment.