Christ knew the crucifixion was coming and he broke the news by saying: "The light will be with you just a little while longer."
Now, Christ also said that his job was to preach the gospel (Luke 4:43), and said that he had completed the job that God sent him to do (in a prayer before the crucifixion).
So the light was shining when Christ was delivering his Kingdom Gospel (which was not about blood for sin), and was not shining when Paul said "Christ died for our sins" long after Christ was gone.
And believers tell me that Christ's own Apostles did not even know that the crucifixion was "good news for mankind" after he had been preaching the gospel to them for over two years!
So is the conclusion that believers passed up the Gospel Christ delivered when the light was shining, but picked up on the blood gospel that came along in the darkness after Christ was gone?