Vampires will rule the world!
We suck each human dry and make them pay for their transgressions! They will see who God really is! They will see that bowing down to an idol is pointless! Vampires are the gods themselves! We will challenge this "God" that they worship and we will take him down! Now onto war with the human race!
Destroy everyone who does not repent and who does not join us! Anyone who does not join us shall die painfully! Show no mercy! Kill them all!

In other words
Join or Die!