Why did Al-Khidr kill a boy?

Al-Khidr killed the boy as part of a divine decree, which was explained in the context of his actions during the journey with Moses. According to the narration, Al-Khidr had a specific reason for this act: the boy was destined to be a disbeliever and would have caused his believing parents to suffer from his rebellion and disbelief. As stated in the hadith, His parents were believers, and we feared lest he would oppress them by obstinate rebellion and disbelief Sahih al-Bukhari 60:250. Al-Khidr's action was ultimately guided by the wisdom and knowledge of Allah, who knew that this boy would lead his parents astray.

The story highlights the theme of divine wisdom that may not be immediately understandable to human beings. Al-Khidr's actions, while seemingly harsh, were intended to protect the faith of the boy's parents and ensure their spiritual well-being. This incident shows that events may happen for reasons that are beyond the immediate understanding of those involved, emphasizing the importance of patience and trust in God's plan, as illustrated by the interactions between Moses and Al-Khidr throughout their journey.