4 “I set no wicked thing before my eyes”....I did love no wicked thing. And he explains this same wicked thing: “I hated them that do unfaithfulness.” Attend, my brethren. If you walk with Christ in the midst of His house, that is, if either in your heart you have a good repose, or in the Church herself proceed on a good journey in the way of godliness; ye ought not to hate those unfaithful only who are without, but whomsoever also ye may have found within. Who are the unfaithful? They who hate the law of God; who hear, and do it not, are called unfaithful. Hate the doers of unfaithfulness, repel them from you. But you should hate the unfaithful, not men: one man who is unfaithful, has, you see, two names, man, and unfaithful: God made him man, he made himself unfaithful; love in him what God made, persecute in him what he made himself. For when you shall have persecuted his unfaithfulness, you kill the work of man, and freest the work of God. “I hated the doers of unfaithfulness.”
Source: The Enarrations, or Expositions, on the Psalms (New Advent)