Gone and forgotten - first off, welcome!
On your view of blood - do you believe blood (as a symbol of life) to be of more importance to god than life itself?
It seems to me that upholding the sanctity of blood at the expense of life is like a man choosing to save his wedding ring at the expense of his marriage. I urge you to look into the matter prior to having another surgery - I'd hate to see this cult take another life, especially after you've already escaped.