Contradiction with Matthew 6:14
Contradicts by emphasizing forgiveness, whereas Psalms 28:5 talks about recompensing and not understanding the works of the Lord.
Matthew 6:14: For if ye forgive men their trespasses, your heavenly Father will also forgive you:
Contradiction with Luke 6:35
Encourages love and kindness even to enemies, contradicting the idea of not considering the works of the Lord and being punished.
Luke 6:35: But love ye your enemies, and do good, and lend, hoping for nothing again; and your reward shall be great, and ye shall be the children of the Highest: for he is kind unto the unthankful and [to] the evil.
Contradiction with Proverbs 3:5
Advises trusting in the Lord with all your heart and not leaning on your own understanding, whereas Psalms 28:5 implies a consequence for not understanding His works.
Proverbs 3:5: Trust in the LORD with all thine heart; and lean not unto thine own understanding.
Contradiction with Ezekiel 18:32
Highlights God’s lack of pleasure in the death of the wicked but rather their repentance, contrasting with the idea in Psalms 28:5 of destroying those who don't regard His works.
Ezekiel 18:32: For I have no pleasure in the death of him that dieth, saith the Lord GOD: wherefore turn [yourselves], and live ye. [yourselves: or, others]