I am aware of this, as you say it is somewhat obscure. Human sacrifice was so much a fabric of society thousands of years ago it is hardly surprising that the Bible alludes to so many events of a ritualistic sacrificial nature. it is in my opinion perfectly plausible and logical to presume that both the Jewish and Christians in the formative periods of their respective religions would have had to persuade and convince Pagan peoples of the inherent superiority of their new creeds and would have resorted to mimicry of their own cannibalistic traditions with these rituals. This explains the story of Isaac's binding and Jesus vicarious suffering on the sacrificial cross/Eucharist.
Fear of rioting, disorder at Temple Mount prompt restrictions on Muslim worshiper (Haaretz)
from the article: And supposing they did drink blood?