Jesus Nazis FTW.
And yeah. I pretty much created the Purge to consist of everything anti-vampire. Their armor and weapons mean that every Crusader can stand up to Newbloods in melee with ease. Their Automatic Crossbows are far less capable against powerful armor, but can instantly kill any vampire struck in the heart - even Oldbloods. The Baptizer functions much like a flamethrower, but with an extended range, fuel capacity and the advantage that it only harms vampires. They also use fire because..... well, because Inferno Tanks are just badass. No two ways around it, that was added solely for the badass factor.