interesting. re: muggle vaiting vs immortality, in CoS, the young version of voldemort, tom riddle, tells harry that he stopped caring about muggles and started being interested in teh person who destroyed his adult self, harry. if young tom evolves from an hatred of muggles to obsession ith his own death [and preventing it], it makes sense that his adult self would have changed priorities as well.

I like your take on the importance of harry's blood.