Ummm..... Kurai, you do realize that the Purge (and Kami no Kage) don't work for the vampires, right? In fact, they're extemist vampire hunters who are prepared to kill anyone who prevents them from killing vamps.

I mean, it's possible I read your post wrong but it seems you're accusing Kami no Kage of collaborating with vampires, which would make no sense.