Because their sister Dinah had been defiled, Jacob's sons replied deceitfully as they spoke to Shechem and his father Hamor.
NIV
The sons of Jacob answered Shechem and Hamor his father deceitfully, [justifying their intended action by saying, in effect, we are going to do this] because Shechem had defiled and disgraced their sister Dinah.
AMP
And the sons of Jacob answered Shechem and Hamor his father deceitfully, and said, because he had defiled Dinah their sister:
KJV
They put Hamor and his son Shechem to the sword and took Dinah from Shechem's house and left.
NIV
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.
AMP
And they slew Hamor and Shechem his son with the edge of the sword, and took Dinah out of Shechem's house, and went out.
KJV
The young man, who was the most honored of all his father's family, lost no time in doing what they said, because he was delighted with Jacob's daughter.
NIV
And the young man did not delay to do the thing, for he delighted in Jacob's daughter. He was honored above all his family [so, ranking first, he acted first].
AMP
And the young man deferred not to do the thing, because he had delight in Jacob's daughter: and he was more honourable than all the house of his father.
KJV