1) He is the Messiah but not only the Messiah:
Again the high priest asked him, “Are you the Messiah, the Son of the Blessed One?”
“I am,” said Jesus. “And you will see the Son of Man sitting at the right hand of the Mighty One and coming on the clouds of heaven.”
“I am,” said Jesus. “And you will see the Son of Man sitting at the right hand of the Mighty One and coming on the clouds of heaven.”
(Mark 14:61-62)
2) He is the 'king of the Jews' but not only the 'king of the Jews':
“Are you the king of the Jews?” asked Pilate.
“You have said so,” Jesus replied.
“You have said so,” Jesus replied.
(Mark 15:2)
3) He is definitely NOT the 'king of the Jews' even if (and contra factum that) he is proclaimed explicitly with extreme emphasis as such:
The written notice of the charge against him read: THE KING OF THE JEWS.
(Mark 15:25)