Lets look more deeply or in reality mockingly into the concept that sin resides in the blood and transfusions are sinful as the Watchtower claims.
For instance you can use a combination of radiation and chemicals to destroy the red blood cell production sites within the body.
so lets do this to a hypothetical Jehovah Witness, knock out his bone marrow and with a suitable match from a Muslim store the Muslims donated blood over time so we can do two things.
1Give the Jehovah Witness a total blood transfusion and 2 also perform a bone marrow transplant from the Muslim.
So now the blood circulating through the Jehovah Witness is Islamic and future red blood cell production is from Islamic bone marrow.
I am tipping that the Jehovah Witness will still attend a Kingdom Hall proclaim Jesus is just an angel and the Muslim will still go to a Mosque face Mecca and proclaim Allah and Mohammed as his prophet.
The Jehovah Witness wont just get up post blood transfusion and scream Allah Ahkbar uncontrollably.
The blood and bone marrow transfusion wont make one iota of a difference to both their joint fates.
