Leviticus 20:9 For anyone who curses his father or his mother shall surely be put to death; he has cursed his father or his mother; his blood is upon him.

This seems like an unjust punishment. What constitutes cursing your father or mother? Why would God ask his people to pass judgement or punishment on his behalf? Couldn't he reserve ultimate justice for the disobedient child in the afterlife? Why would he not allow the individual a chance to redeem themselves and be forgiven for their sins?