In an odd Bible story, a Jewish woman is raped, her rapist wishes to marry her, the woman’s brothers demand that the rapist’s people be circumcised, and after they are all circumcised the brothers go in and kill them all:

Gen 34:1 Now Dinah the daughter of Leah, whom she had borne to Jacob, went out to see the daughters of the land.
Gen 34:2 And when Shechem the son of Hamor the Hivite, prince of the country, saw her, he took her and lay with her, and violated her.
Gen 34:3 His soul was strongly attracted to Dinah the daughter of Jacob, and he loved the young woman and spoke kindly to the young woman.
Gen 34:4 So Shechem spoke to his father Hamor, saying, “Get me this young woman as a wife.”
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Gen 34:7 And the sons of Jacob came in from the field when they heard it; and the men were grieved and very angry, because he had done a disgraceful thing in Israel by lying with Jacob’s daughter, a thing which ought not to be done.
Gen 34:8 But Hamor spoke with them, saying, “The soul of my son Shechem longs for your daughter. Please give her to him as a wife.
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Gen 34:13 But the sons of Jacob answered Shechem and Hamor his father, and spoke deceitfully, because he had defiled Dinah their sister.
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Gen 34:15 But on this condition we will consent to you: If you will become as we are, if every male of you is circumcised,
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Gen 34:24 And all who went out of the gate of his city heeded Hamor and Shechem his son; every male was circumcised, all who went out of the gate of his city.
Gen 34:25 Now it came to pass on the third day, when they were in pain, that two of the sons of Jacob, Simeon and Levi, Dinah’s brothers, each took his sword and came boldly upon the city and killed all the males.

The Bible deals with this story in a “matter of fact” tone. It doesn’t seem to pass judgment (either positive of negative). This is just a historical story.