From JF Facts Site " It was not until the 1950's that the Watchtower specifically outlined its censorship of blood transfusions , over 80 years after the commencement of the Watchtower Society. If the doctrine on blood is such a critical doctrine, one must wonder why God would wait so many decades before revealing it as such through the Watchtower."
Rutherford laid the foundation for this murderous, unscriptural Doctrine to develop, by stating that the Law to Noah on Blood was binding on all humans. Franz. F. was the mover behind the 1950's finalisation of a death sentence for many J.W's ,including children.