If someone comes to kill is, we understand that we have the right, and even the responsibility, of self-defense (Berakhot 64b, Sanhedrin 74a). When others are threatened, we are called to help them as well. "Do not stand idly by your neighbor's pain." (Leviticus 19:17-19)
This is not an option. It is a mitzvah.
This is not an option. It is a mitzvah.
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