The sacrifice Jesus made was in giving his time while he was here to crusade against the oppressive lying scribes and pharisees. There were probably many things he could have done to enjoy life, but he forfeited those things to do for others. He tried to free people from the oppressive Iron Hand that was ruling them with nit-picking rules and laws and clobbering them with guilt and sorrows.
Just like The JC has added onto many of those rules and laws. Moses never mentioned rap music. now it's a felony offense at the KH. Scribes are like that. The whole system has been contrived for the purpose of controlling people and using them.
Same sort of thing. Jesus tried to wake people up to the hypocrisy of it. When he called his people 'sheep' it was another parable...trying to tell them the scribes (religious leaders) and pharisees (political powers) were "pulling the wool over their eyes".
Now, considering the "blood sacrifice"....these things were written into stories many years after the events. "Jesus died for your sins" was a way to throw the guilt back on the people and to get his murderers off the hook. These blood drinking symbols in the church are no different from the blood drinking ceremonies in the death cults still prevelant today.
One author mentions something called Star Fire that is interesting if you wish to pursue more reading. Basically that the angels who portrayed themselves as gods drank blood to sustain themselves and this is why humans had to sacrifice blood to them, but were not allowed to drink it themselves.
We have much evidence today that "holy scriptures" have been contrived and probably re-written to serve the vatican's purpose. after all, it was the vatican who approved what was allowed to be given to the people as far as biblical knowledge. There was a time when people were not allowed to read scriptures and were privy to know only what the priest or pope allowed them to know verbally.