Isaac and the Crucifixion of Christ?

i've been thinking about two parts of the bible, which is the story of isaac and e the crucifixion of christ. And one of the things that also struck me was mostly the differences between isaac and christ. The main difference, it seems to me, is tor of a difference in direction of sacrifice. I do think it's reasonable to think about it as a form of foreshadowing, least the way the bible is set up....