Why is jack feeling guilty as he and the three others trot toward castle rock?

Jack feels guilty as he and the others head toward Castle Rock because he is aware that his actions, driven by a desire for power and dominance, have contributed to the group's increasingly violent and chaotic behavior. This guilt may stem from an internal conflict between his instinctual desires and the moral implications of their actions. Additionally, Jack's leadership ambitions lead him to suppress these feelings, creating a tension between his guilt and his drive for control.