Well kiddo, Judaism is a religion that has been around for thousands of years, and throughout its history, there have been times when people who believe in this religion have had to fight in wars to protect their beliefs and their way of life.
Judaism teaches that it is important to defend oneself and one's community against threats, but it also values peace and the protection of human life. In fact, the most important commandment in Judaism is "thou shalt not kill," which means that taking someone's life is not allowed unless it is absolutely necessary for self-defense or the defense of others.
In times of war, Jewish soldiers are expected to act with courage, but they must also follow strict rules of engagement that aim to minimize harm to innocent people and avoid unnecessary violence. This is because Judaism teaches that all human life is valuable and must be protected, even in times of conflict.
One of the most well-known stories in the Jewish Bible is the story of King David, who was a warrior and fought many battles to protect his people. But even David, who is celebrated as a hero in Jewish tradition, was not above reproach – he was criticized for his treatment of prisoners of war and for taking the wife of one of his soldiers.
So, while Judaism acknowledges the reality of warfare and the need to defend oneself against threats, it also emphasizes the importance of ethical behavior and compassion towards others, even in times of conflict.