Most Vampires get their own feed and don’t care who they get it from. But for the highest Lords of the Vampire hierarchy they have little time to go about the process of obtaining blood and prefer some of a good source, so they get their Quartermasters to take blood of good quaility from important victims.
He is fat, kind, witty and against violence. The last person you would expect to be a vampire
Not all vampires in the land of the dead are bloodthirsty killers that want to take over the world. Some are satisfied with immortality and want to spend an eternity without strife in seclusion away from contant war with the humans.
A cult's theology is binding on the god involved: it is possible for that god to believe (and see, just like Winston Smith in 1984) that other gods are mythical, or jumped-up demons, or failing older spirits, even while those gods actually exist and thrive and act in the cosmos, even while working against him.