Just something to keep in mind, there are many proud races in this galaxy. Easy enough to offend them with all the customs and etiquette.
Vampires seem as a rule unable to sire demons and the like, but I don't believe mortal races have the same protection against it. Perhaps it has to do with a mortal inclination towards trying to cling to the earthly vessel that it grips upon. Regardless of reason it seems as though more are susceptible in this universe than in yours. Was the holy water effective?