I don't understand how you came to this conclusion.
If Jesus had not been born 2000 years ago and rejected by the people of the age, and if He suddenly came today, bringing a message of peace and anti-materialism and giving of one's wealth and time to care for our neighbors and performing mysterious miracles and decrying the TV evangelists and moneychangers, we would kill him too. I'm quite sure of it. So we share the guilt, and we share the reward.