Let us see the whole picture by revealing the whole scene of John 11:51-52
Let us read from 45 to 52, what is this scene?
John 11:45-52 New International Version (NIV)
Therefore many of the Jews who had come to visit Mary, and had seen what Jesus did, believed in him. But some of them went to the Pharisees and told them what Jesus had done.
Then the chief priests and the Pharisees called a meeting of the Sanhedrin.
“What are we accomplishing?” they asked. “Here is this man performing many signs. If we let him go on like this, everyone will believe in him, and then the Romans will come and take away both our temple and our nation.”
Then one of them, named Caiaphas, who was high priest that year, spoke up, “You know nothing at all! You do not realize that it is better for you that one man die for the people than that the whole nation perish.”
He did not say this on his own, but as high priest that year
he prophesied that Jesus would die for the Jewish nation, and not only for that nation but also for the scattered children of God, to bring them together and make them one.
No mention of Jesus Christ being King of the Jews anywhere in John 11
The scene was the meeting of villains where they discussed about Jesus being a threat to their very existence.
What is mentioned is Jesus would die for the Jewish nation - which doesn't make one a king of the Jews.
It also said Jesus would also die for the scattered children of God - the true Christians, which distinguishes from the Jewish nation.
When Jesus Christ was asked by Pontius Pilate what did he answer?
Mark 15:2 New International Version (NIV)
“Are you the king of the Jews?” asked Pilate.
“You have said so,” Jesus replied.
The Jewish Nation is an earthly kingdom
Jesus Christ said his kingdom is not an earthly kingdom
Therefore Jesus Christ is not the king of the Jews
I believe the use of king of Jews on Jesus Christ is a mockery of the Lord
John 19:2-3 New International Version (NIV)
The soldiers twisted together a crown of thorns and put it on his head. They clothed him in a purple robe and went up to him again and again, saying, “Hail, king of the Jews!” And they slapped him in the face.