Read Genesis 34:24-31 | Full Chapter
And all the people who went out of the town gate listened and heeded what Hamor and Shechem said; and every male was circumcised who was a resident of that town. But on the third day [after the circumcision] when [all the men] were sore, two of the sons of Jacob, Simeon and Levi, Dinah's [full] brothers, took their swords, boldly entered the city [without danger], and slew all the males. And they killed Hamor and Shechem his son with the edge of the sword and took Dinah out of Shechem's house [where she had been all this time] and departed.
(Genesis 34:24-26, AMP)
Simeon and Levi avenge the raping of their sister Dinah. Plus some. Plus a lot. Their action is extreme, punishing the whole town for the act of Shechem and its acceptance by Hamor. Certainly, it is more than required for simply rescuing Dinah.
This might be a useful time for me to get on my soapbox about not following blindly political leaders. It gets people killed. That is all.
[Then the rest of] Jacob's [eleven] sons came upon the slain and plundered the town, because there their sister had been defiled and disgraced. They took their flocks, their herds, their donkeys, and whatever was in the town and in the field; All their wealth and all their little ones and their wives they took captive, making spoil even of all [they found] in the houses.
(Genesis 34:27-29, AMP)
Now, the other nine brothers (Benjamin not yet born), enter the town and take the spoils. It’s not clear whether the whole is coordinated, or if the other nine are simply taking advantage of Simeon and Levi’s actions. Regardless, this whole situation works out pretty good for them, at least in the immediate. I acknowledge that’s a cynical comment, but I can’t believe the motiviation of avenging Dinah alone could have justified this wholesale slaughter. On another hand, the men of the town were deceived by the promise of the same sort of riches and plunder that Jacob’s sons now experience.
And Jacob said to Simeon and Levi, You have ruined me, making me infamous and embroiling me with the inhabitants of the land, the Canaanites and the Perizzites! And we are few in number, and they will gather together against me and attack me; and I shall be destroyed, I and my household. And they said, Should he [be permitted to] deal with our sister as with a harlot?
(Genesis 34:30-31, AMP)
It’s up to Jacob to point out the downside: they may have made many more enemies. After all, the locals will wonder if it’s not better to get rid of these foreigners as soon as possible, and form an alliance amongst themselves to ensure utter victory. Simeon and Levi are not having it. They respond that their actions were appropriate to defend Dinah’s honor.
And where is the middle ground? To me, killing Hamor and Shechem would have been justifiable. But it would have been less likely to subject them to the “pre-emptive” attacks of others. Yes, there would have been new difficulties with that action. Would the townspeople attack in response? If not, does Jacob become the de-facto leader of this town? And so on. An argument in favor of the sons’ actions would be that these Canaanites currently in the area are probably the same that Yahweh will lead Israel against after the Exodus. However, there’s no record of Yahweh approving this particular attack.
Anger unchecked often results in an excessive response that causes unnecessary and undeserved suffering.