John Gill Commentary Lamentations 4:13

"[It is] because of the sins of her prophets, [and] the iniquities of her priests, That have shed the blood of the just in the midst of her." — Lamentations 4:13 (ASV)

For the sins of her prophets, [and] the iniquities of her priests Aben Ezra interprets this of the prophets of Baal, and the priests of the high places; but though false prophets and wicked priests are meant, yet such as were among the Jews, made choice of and approved of by them: see (2 Chronicles 36:14); not that the people were faultless, but these were the principals, who by their examples led on and encouraged the common people in sin: that have shed the blood of the just in the midst of her; not the blood of innocent children, sacrificed to them by Moloch; but of good men in general, whom they persecuted and slew; and of the true prophets of the Lord in particular, whose blood they shed; and was the sin that brought on the destruction of their city by the Romans, as well as of that by the Chaldeans; see (Matthew 23:35–38) (James 5:6).