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God is not the author of confusion 1 Corinthians 14:33
All contradictions in The Mormon Scriptures
But the only Zechariah that was murdered in the Bible was the son of Jehoida, not Barachias.
There was a Zechariah who was the son of Barachiah (Zechariah 1:1). Apparently Jesus (or the author of Matthew) confused the two.
And the spirit of God came upon Zechariah the son of Jehoiada .... And they conspired against him, and stoned him with stones at the commandment of the king in the court of the house of the lord. 2 Chronicles 24:20-21
Zacharias son of Barachias, whom ye slew between the temple and the altar. Matthew 23:35