AuntBee: I like this topic when trying to plant seeds with JWs, as i have opportunity.
I have asked JWs if they believe that Jesus shed his blood so all can live. And they invariably say "yes". And then I ask them "if Jesus gave his blood, why don't you?" They usually splutter and pull out some kind of nonsense about blood beening sacred and then try to find a bibble verse.
If they were really interested in saving lives they would donate blood instead of trying to convert people to their noblood phobia.