I like to demystify things, and I wonder: What if all of this is simply a result of Jews being outcast from the societies in which they inhabit? There are many histories of "Jewish quarters" in which they lived and bred among lepers and other genetic "refuse" in the literal sense that they were discarded as rubbish.

After a period of time, a very physically unfit Jew realizes that "hey I feel much better when I drink the blood of healthy people", then would begin to kill to feel better, thus feeling himself a sort of vampire before such a term existed, and, perhaps, after he showed others and the practice became "traditional", as history proves, then their self-created mythos of being "of Satan" is to explain away their lot in life; to seem more than they really are, which is, quite honestly, the purity of impurity; the concentration of societal dregs.

I don't know; I know this is probably too theoretical for this sub. You all are very scientific in your approach, and I want to say that I've come to respect your dedication to truth.