This was one of the first things I questioned as it pertained to the traditions of Christianity, as I studied the first five books of the Bible, I noticed that there was a strong commandment not to drink blood or any manner of blood was considered "unclean." I actually shortly later read a book called Jesus and the Big Lie, which I can no longer find on Amazon or Kindle, where I read it. This book opened my eyes to several other abominable things that are passed over as tradition of Christians. I'll put the Scripture for this in the Classroom.