"Do what you came for, friend." (Matthew 26:50)

While he was still speaking, Judas, one of the Twelve, arrived. With him was a large crowd armed with swords and clubs, sent from the chief priests and the elders of the people. Now the betrayer had arranged a signal with them: "The one I kiss is the man; arrest him." Going at once to Jesus, Judas said, "Greetings, Rabbi!" and kissed him. Jesus replied, "Do what you came for, friend." Then the men stepped forward, seized Jesus and arrested him. (Matthew 26:47-50)

Why was Jesus so kind to those who arrested him?

How many people do we know that would greet a large crowd of armed guards who came to arrest them with such kind words? Would they greet their arrestors as "friend'?

This statement by Jesus says three things. First, it confirms other statements by Jesus, as well as his prayers, that he was acting to please God. He was standing up for God's teachings. He could have evaded arrest. He could have run off into the wilderness. But he didn't.

This was all done to please Jesus' beloved, the Supreme Being:
"Now is the Son of Man glorified and God is glorified in him." (John 13:31)
Secondly, this also indicates that Jesus was not surprised by his arrest. He was not only fully aware of what would happen, but had a hand in the arrangements of his arrest. This is confirmed as Jesus spoke the following to Judas before Judas left to get the guards:
"What you are about to do, do quickly," Jesus told him, but no one at the meal understood why Jesus said this to him. (John 13:27-28)
The third thing that Jesus' statement says is that even with his arrest by adversarial guards sent by the institutional temple priests to capture him, Jesus still loved them. He called him (likely the lead guard) "friend." Is this how a person greets someone who will shackle him and arrest him?

But Jesus is not a typical person. He is the representative of God, and the loving servant of God, and in his love for God, he loved them. He cared for them. Why?

Because Jesus saw them as children of God - spiritual beings.

Did Jesus die?

Jesus communicated many times the distinction between the person and the physical body:
"The spirit is willing, but the body is weak." (Matthew 26:41)
and
"Do not be afraid of those who kill the body but cannot kill the soul." (Matthew 10:28)
This indicates that Jesus differentiated between the physical body and the spiritual person within the body. We are each spiritual in essence, not physical. As our body ages from the baby body to the elderly body, we remain the same person within.

We do not die when the body dies. Neither did Jesus. The spiritual identity is not visible with the physical eyes, but Jesus was a spiritual being and he saw each spiritual person within everyone - even within the physical bodies of the guards.

Thus Jesus did not die. His body was killed on the cross, evidenced by the guards taking down the body and testing it. It was lifeless because Jesus' spirit had left that body:
And when Jesus had cried out again in a loud voice, he gave up his spirit. (Matthew 27:50)
But as evidenced later, Jesus' spirit person, through an apparition, reappeared to his closest disciples. Why? To show those disciples that he did not die - and none of us will die. This was an important part of Jesus' teachings.

But what was the most important part of Jesus' teachings?
'Love the Lord your God with all your heart and with all your soul and with all your mind.' This is the first and greatest commandment." (Matt. 22:37-38)