To examine the act of Sisera's death by Jael, one might first judge it based on its apparent nature. The circumstances may suggest to many that she acted unlawfully; many could easily conclude she did wrong for several reasons: a) She ostensibly violated the sixth commandment, “Thou shalt not kill” (Exodus 20:13). b) She killed a man who commanded the king's forces and was an ally of her husband, thereby betraying peace and committing an act of treachery. c) As someone not of Israel, she had no authority to execute judgment upon Sisera. d) She contradicted the principles of hospitality, meeting him with kindness while falsely assuring him of safety. e) It could be deemed inhumane and cruel to kill a man in despair who had relied on her for protection. f) Her words and actions may present a façade of deception, casting doubt on her integrity. Thus far, the discussion hinges solely on the superficial understanding of events; let us now explore a deeper perspective.
When Jael acted against Sisera, she did not sin at all. The first reason is that God commanded the Israelites to eradicate the Canaanites, and the prophetess Deborah declared Sisera's fate, prophesying that he would surely be delivered into Jael’s hands, thus fulfilling God’s will. Secondly, the Holy Spirit inspired her actions and commended her bravery unequivocally. Thirdly, the conflict waged by Israel was just, and Jael was a supporter of this righteous endeavor. Fourthly, Jael and Heber were far more aligned with the Israelites than with Jabin or Sisera, who practiced no true worship. Heber was of the lineage of Joab, Moses’ relative, sharing in the faith and piety of Israel and enjoying their favor. Fifthly, had Jael hidden Sisera and failed to inform Barak, she would have committed a grave sin, directly opposing God’s will, the prophetic revelation, the justice of warfare, established laws, and the sanctity of true faith.
Moreover, there are additional objections to consider. a) A higher law takes precedence over lower laws; thus, the commands associated with true faith and divine service are paramount when evaluating duties towards others. Indeed, actions such as hating parents, harming children, defying rightful authority, betraying allies, or violating hospitality are all abhorrent unless commanded by God. Numerous examples in Scripture illustrate this principle. b) Despite Sisera's alliance with her, Jael's actions predominantly favored those with whom she shared a greater allegiance. c) Jael was justified in eliminating Sisera as per God’s explicit command, which was beneficial for the Israelites. d) Deception may be permissible in a just war against foes. e) Ultimately, truth must hold greater weight than a particular sense of humanity. f) Finally, although Jael's words and actions may appear deceptive, they did not constitute falsehood; her intentions were noble, and even if her deeds did not align with her words, they worked toward a righteous end.