Vengeance for Injustice?

Genesis 34:1-17 

1 Now Dinah the daughter of Leah, whom she had borne to Jacob, went out to see the daughters of the land. 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. 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. 4 So Shechem spoke to his father Hamor, saying, “Get me this young woman as a wife.” 5 And Jacob heard that he had defiled Dinah his daughter. Now his sons were with his livestock in the field; so Jacob held his peace until they came. 6 Then Hamor the father of Shechem went out to Jacob to speak with him. 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. 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. 9 And make marriages with us; give your daughters to us, and take our daughters to yourselves. 10 So you shall dwell with us, and the land shall be before you. Dwell and trade in it, and acquire possessions for yourselves in it.”
    11 Then Shechem said to her father and her brothers, “Let me find favor in your eyes, and whatever you say to me I will give. 12 Ask me ever so much dowry and gift, and I will give according to what you say to me; but give me the young woman as a wife.”  13 But the sons of Jacob answered Shechem and Hamor his father, and spoke deceitfully, because he had defiled Dinah their sister. 14 And they said to them, “We cannot do this thing, to give our sister to one who is uncircumcised, for that would be a reproach to us. 15 But on this condition we will consent to you: If you will become as we are, if every male of you is circumcised, 16 then we will give our daughters to you, and we will take your daughters to us; and we will dwell with you, and we will become one people. 17 But if you will not heed us and be circumcised, then we will take our daughter and be gone.”

Jacob’s daughter was raped by the prince of the land where Jacob settled; he saw her and violated her against God’s law and for his own pleasure.  Then he covered it up with a declaration of love (though forcing himself on her is hardly true love).  Jacob heard of it, but did not tell her brothers right away until Shechem’s father Hamor spoke with Jacob.  Then they were infuriated at the disgraceful act.  Hamor tried to make it legitimate by asking Dinah as wife for his son to intermarry and be fruitful as part of those not of God’s people.  Therefore the sons of Jacob, her brothers, lured him in by first demanding that he be circumcised as if to be joined to God’s people (but it was a deception).  They also told him that all his people must do this before they could live together as one.  If he disagreed, there would be no wedding.  Here we see vengeance against the unrighteous by taking God’s justice in hand instead of letting God first tell them to do so or to allow God Himself to intervene.  How often we see injustice and jump in with further injustice as if we were seated on His throne.  This is why God gave us civil governments and laws to keep even well deserved retribution out of individuals’ hands.