Musar su Genesi 29:12

When they said: "The brother of the master was a swindler," they deliberately referred to him as "brother" instead of saying "Jacob the swindler." Their intent was to make Jacob's trickery appear to have been greater than it was. They referred, for instance, to the time Jacob introduced himself to Rachel as the brother of her father, (the swindler), something which Rashi justifies as Jacob telling Rachel not to worry, that he, Jacob, would be able to cope with devious Laban (Genesis 29,12). Whereas the Romans could see Jacob's trickery as justified in the case of Laban, since Laban had been the first one to use trickery, this could not be said in the case of their Master Esau, who had never tried to cheat Jacob. Jacob cheated Esau out of his birthright as well as out of his blessing; because of this they emphasized that Jacob was both a swindler and a forger.