In my novel, I'm working on having some form of clan/club/group of 'pure-bloods' that are descended from Van Helsing that are now an entire organization (in the 21st century) still working to carry out his will and finish his work of 'purifying the earth'. The founder of this organization is Van Helsings' 4th generation grandaughter.
Their goal is to eliminate all supernatural creatures, because of course, they are inherently evil. But the wall I'm running into is this: why? What would be a justifiable reason for them to believe themselves purer than these other beings? And how could they be wrong?
Do they believe that vampires, and faeries, and all else are demons? Do they believe they're created from dark magick maybe? And if so, what makes them so sure of that? I've been playing with the idea of opposing/fighting gods - one over the Van Helsings and one who created all the other creatures that are supposedly evil - but I'm not sure the reason is strong enough.