I grew up Christian for about 28 years, I went to all catholic schools my whole life. Are you familiar with Christianity?
Who is not? It is the world largest religion that has over 2.4 billion followers
True! I'm not anymore though, I haven't been for about 5 years. 
Why do you stop being a Cristain. Don't you believe that Jesus is the Son of God and the savior of humanity anymore?
I'm kidding, I still do. I wanted to see what you would say. I have a christian friend that disowned our agnostic friend recently though which I think is unfair.
Why does he do that. Jesus never do that as the the central figure of Christianity.
That's a great response! That's what I told him also. I don't think he understands his own religion.
Jesus
Jesus (), also referred to as Jesus of Nazareth and Jesus Christ, was a first-century Jewish preacher and religious leader. He is the central figure of Christianity. Most Christians believe he is the incarnation of God the Son and the awaited Messiah (Christ) in the Old Testament.
Virtually all modern scholars of antiquity agree that Jesus existed historically, although the quest for the historical Jesus has produced little agreement on the historical reliability of the Gospels and on how closely the Jesus portrayed in the Bible
who do not belong to their group - even in a thoroughly secular (though formerly Christian) society.
Demographics.
As of the early 21st century, Christianity has approximately 2.4 billion adherents. The faith represents about a third of the world's population and is the largest religion in the world. Christians have composed about 33 percent of the world's population for around 100 years. The largest Christian denomination is the Roman Catholic Church, with 1.17 billion adherents, representing half of all Christians.
Christianity remains the dominant