Exactly who called for this? It was the political leaders of that time--it certainly was not the commoners or even the everyday practitioners of Judaism. Even two of the leaders had nothing to do with this. The political leaders gathered together a mob, kind of like what is done today--Minneapolis being the most recent example of powerful players gathering their mob.
At that time there is an estimated population of about 600,000 Jews. Let's say there 100,000 Jews in Jerusalem that were there to celebrate Passover. Clearly not even all of these were present at the trial. In other words, probably less than one percent of the Jews in Palestine were crying, "His blood be on us and on our children." No, that was the blood of those political leaders, the few but the powerful.
In Revelation, how did John view this: He viewed the followers of Christ washing their robes in the blood of the Lamb, because that blood is what sanctifies. Christ's death was to redeem the entire world, and that redemption included the children of those who were calling for his crucifixion. This is a good example for those of us who appreciate irony....