אֲשֶׁ֨ר קֹנֵיהֶ֤ן יַֽהֲרְגֻן֙ וְלֹ֣א יֶאְשָׁ֔מוּ וּמֹכְרֵיהֶ֣ן יֹאמַ֔ר בָּר֥וּךְ יְהוָ֖ה וַאעְשִׁ֑ר וְרֹ֣עֵיהֶ֔ם לֹ֥א יַחְמ֖וֹל עֲלֵיהֶֽן׃
чьи покупатели убивают их и не считают себя виновными; и продающие их говорят: да будет благословен Господь, ибо Я богат; и их собственные пастухи их не жалко.
Rabbeinu Bahya
אבל אשמים אנחנו על אחינו, “but we are guilty concerning our brother, etc.” It is the customary thing for righteous people to acknowledge mistakes they have made and to acknowledge G’d’s justice when they feel they are being punished for some sin. This is the meaning of Leviticus 5,19 אשם הוא, אשום אשם לה', “it is a guilt offering; he has become guilty before the Lord.” [The Torah discusses a guilt-offering brought by a person who became aware of his error but had not been accused by man to have committed such an error. Ed.] By contrast, it is the norm for wicked people to deny that they committed any sins at all. This is the meaning of Zecharyah 11,5: “whose buyers will slaughter them with impunity.” They will not admit having committed a sin.