And now, brethren, I know that through ignorance you did it, as did also your rulers.
All Commentaries on Acts 3:17 Go To Acts 3
Thomas Aquinas
AD 1274
But those of lesser degree---namely, the common folk---who had not grasped the mysteries of the Scriptures, did not fully comprehend that He was the Christ or the Son of God. For although some of them believed in Him, yet the multitude did not; and if they doubted sometimes whether He was the Christ, on account of the manifold signs and force of His teaching, as is stated Jn. 7:31,41, nevertheless they were deceived afterwards by their rulers, so that they did not believe Him to be the Son of God or the Christ. Hence Peter said to them: "I know that you did it through ignorance, as did also your rulers"---namely, because they were seduced by the rulers.