There are diverse schools of thoughtt in interpeting scripture. Case in point Moshe: The orthodox sect Satmar denounces the state of Israel and is alleged to give support to palestine. The karta another jewish sect residing in the republic of Israel backs up and fights with the Palestinians against Israel allegedly. All this because of interpretation of Scripture.
It is noteworthy that the Torah records God executing individuals in ancient Israel for violting the Sabath. The torah also very clealry states the death sentence for other violations of Jewsih law and nowhere in the written torah do rabbis have any appointment or authority from God whatsoever.
While it is true that all modern jewish movements allow the breaking of jewish laws for life sake, (which makes sense): working on yom shabos, eating non kosher food including pork and so on to save a life, ultarorthox movements have extreme views according to orthodox jews. It is alleged by the wts and jws that jews belonging to various movements did attack and cause physical injury to jws on various occassions for preaching in the United States of America. One jw woman was blinded in one eye by a jewish mob for preaching. I personally did observe a group of orthodox jews beat the living daylights out of a man kicking him in the face and stomping on him while he was on the floor on 13th ave in brooklyn, on the sabbath! Jws cannot preach in jewsih territory in the United States of America because jewish mobs form very quickly and attack jws. 60 percent of my friends are jewish. I am only stating what I know.
I think that blood is risky. I would not take blood frivoulusly. Many medical proceedures have been done with blood and without blood succesfuly and may indivuals ahve been horribly infected and killed with blood. Great to have the freedom to choose..