Jerome : (Verse 7.) Did he strike him according to the blow of the one striking himself: or as he killed his killers, so was he killed? This place is understood in two ways. Either against Jerusalem, so that he may say that she was not struck by God in the same way that she struck Christ and his Apostles: or against the multitude of the Gentiles, so that the Apostles and apostolic men, despite being persecuted and shedding Christian blood, nevertheless had care for their salvation and reconciled them to God. — Commentary on Isaiah