Contradiction with Matthew 15:24
Mark 1:38 states that Jesus wanted to preach in other towns, while Matthew 15:24 suggests his mission was only to the lost sheep of Israel.
Matthew 15:24: But he answered and said, I am not sent but unto the lost sheep of the house of Israel.
Contradiction with John 7:8-10
Mark 1:38 reflects Jesus’ intention to preach broadly in Galilee, yet John 7:8-10 depicts Him initially saying He would not go publicly to the feast but then going secretly, showing an apparent contradiction in His approach to ministry and public appearances.
John 7:8-10: Go ye up unto this feast: I go not up yet unto this feast; for my time is not yet full come.