Contradiction with Matthew 15:24
States that Jesus was sent only to the lost sheep of Israel, contradicting Mark 7:25 where a Gentile woman approaches Jesus for help.
Matthew 15:24: But he answered and said, I am not sent but unto the lost sheep of the house of Israel.
Contradiction with Matthew 10:5-6
Instructs disciples not to go to Gentiles, opposing the interaction with a Gentile woman in Mark 7:25.
Matthew 10:5-6: These twelve Jesus sent forth, and commanded them, saying, Go not into the way of the Gentiles, and into [any] city of the Samaritans enter ye not: