And don't the Conquistadors and other Europeans drink the blood of some human who gave himself up for a sacrifice?
Yes, the Roman Catholics who believe in transubstantiation of the bread and wine into the Body and Blood of Christ, and that in this change of substances the unbloody Sacrifice of the New Testament is also contained. In my experience, dating from the 1940's through the 1960's it always looked and tasted like wine (and bread) to me. I became a "lapsed" Roman Catholic about 1964.
http://www.newadvent.org/cathen/05572c.htm
My idea that the sacrifice to Odin was a hanged man was influenced by information along these lines:
http://www.pagannews.com/cgi-bin/gods3.pl?Odin
"Odin was the only god in Scandinavian mythology to demand human sacrifice. Adam of Bremen relates that every ninth year, people assembled from all over Sweden to sacrifice at the Temple at Uppsala. Male slaves, and males of each species were sacrificed and hung from the branches of the trees."
http://en.wikipedia.org/wiki/Odin
"Male slaves, and males of each species were sacrificed and hung from the branches of the trees."
Since Christianity, and so far as I can tell, Islam, demand that adherents obey the teachings of the faith when the civil law cotradicts the teachings of the faith, I thought that Odin's followers might have a similar rule. Heck, that was one thing that drove me to learn to use firearms in the early 1970's! Darn, I could have spent that all that range time doing photography!