What did the sons of Jacob do to the city of Shechem?

Jacob & his entire family had left his Uncle Laban and were heading back home to his Father Isaac in Mamre (Hebron). They stopped at Shechem, which was also the name for Hamor the Horite's son, who was more highly respected than anyone in his clan. Shechem "seized & lay with" Dinah, the daughter of Jacob & Leah. Shechem asked his father to "get me this girl for a wife", but what Shechem had done was an outrage in Israel. Jacob & sons agreed to let Shechem marry Dinah and also "intermarry with each others tribes" if ALL of the men of Shechem would be circumcised. They agreed. On the "third day of their pain", Dinah's brothers Levi & Simeon "advanced against the city w/o any trouble & massacred all the males & took their sister, Dinah. Then the rest of Jacob's sons "followed up the slaughter" and took whatever they wanted from the city, including weaalth, women, children, loot & flocks. Jacob was horrified. He told his family to "get rid of foreign gods, purify yourselves and put on fresh clothes...as we are going up to Bethel" where he would build an altar to God. As they left Shechem, a terror from God fell upon the towns around about, so that no one pursued them.