Why does john want to kill the squire himself in Treasure Island?

In "Treasure Island," John wants to kill the squire himself because he seeks to assert control over his own fate and demonstrate his bravery. He feels a deep sense of loyalty and responsibility to protect his friends and allies. By taking matters into his own hands, he aims to confront the threat posed by the pirate crew directly, showcasing his determination to fight for their survival. This decision also reflects his internal struggle between fear and the desire for heroism.