Contradiction with 1 John 4:8
1 John 4:8 states that God is love, which may seem contradictory to the depiction of God's anger and punishment in Zechariah 10:3.
1 John 4:8: He that loveth not knoweth not God; for God is love.
Contradiction with Romans 8:1
Romans 8:1 speaks of no condemnation for those in Christ, contrasting with the punishment of leaders described in Zechariah 10:3.
Romans 8:1: [There is] therefore now no condemnation to them which are in Christ Jesus, who walk not after the flesh, but after the Spirit.
Contradiction with James 1:13
James 1:13 states that God cannot be tempted by evil nor does He tempt anyone, which seems in conflict with God expressing anger towards shepherds in Zechariah 10:3.
James 1:13: Let no man say when he is tempted, I am tempted of God: for God cannot be tempted with evil, neither tempteth he any man: [evil: or, evils]
Contradiction with Psalm 103:8
Psalm 103:8 describes the Lord as merciful and slow to anger, which contrasts with the immediate expression of anger in Zechariah 10:3.
Psalm 103:8: The LORD [is] merciful and gracious, slow to anger, and plenteous in mercy. [plentious...: Heb. great in mercy]
Contradiction with Matthew 5:44
Matthew 5:44 advises to love enemies and pray for persecutors, which appears inconsistent with the idea of divine punishment in Zechariah 10:3.
Matthew 5:44: But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;
Paradox #1
Zechariah 10:3 could present a contradiction or inconsistency if one views God's anger towards the leaders (shepherds) as conflicting with the idea of a loving and forgiving God. It can seem contradictory that God who is often depicted as being compassionate would express anger towards shepherds for leading their flock astray, instead of offering them guidance and forgiveness. This could be seen as conflicting with the notion of unconditional love and redemption.