ALL the leaders? ALL the people?
Jesus was not put on this earth to be a founder of another religion
Well, I certainly don't disagree with that.
but to fulfill Gods promise to the Jews of delivering a Messiah.
As a Jew, I see it rather differently.
The mass majority that had the power to say "Crucify him and let his blood be on us and our children" were the ones that that sealed his fate, and they were Jews, but you miss the whole point! He was sent as a sacrifice. The Lamb of God sent to forgive your sins, not matter who you are! That was his whole life's purpose. In order to fulfill it, he had to be executed. On several occasions Jews wanted to stone him for his blasphemy, but did not! The Romans killed him, but the Jewish leadership and mob wanted him dead. The mob was Jewish. the leadership was Jewish. But he went willingly to his fate. That is what happened!
You may see it differently if he was the son of God or not. Personally you can see it anyway you want. It will never change the fact of what is! He is the way the truth and the life! And he that believes in him will never die! Do not fear his teaching, embrace them and you will find your life enlightened in ways you could never imagine! Jesus did not die as a Christian, he died as a Jew and a fulfillment of Gods promise to all men.