Contradiction with Proverbs 14:15
Proverbs 14:15 suggests that the simple believe every word, which implies trusting others, whereas Matthew 24:4 warns to take heed that no one deceives you.
Proverbs 14:15: The simple believeth every word: but the prudent [man] looketh well to his going.
Contradiction with 1 John 4:1
1 John 4:1 encourages testing spirits to see whether they are from God, aligning with, rather than contradicting, Matthew 24:4's warning about deception.
1 John 4:1: Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.