After Jesus raised Lazarus from the dead, many people began to believe in Him. This was reported to the Pharisees and so they and the chief priests 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. So from that day on they plotted to take his life. – John 11:47-53