Definitely sounds more Ravenloft if the only magical way you have to root out heretics is to resort to heresy yourself.
Actually, if anyone's read The Eisenhorn Trilogy for Warhammer 40,000? That's perhaps some of my favorite Sci-Fi Literature. It was a series of books basically explicitly written for the sole purpose of enriching the background fluff of the God-Emperor of Mankind's Holy Inquisition so that it would be paletteable for their (then) new spin-off tabletop game
Inquisitor. Within there, they specify that while the Inquisition is universally rooting out Heresy from all corners, within the Inquisition there are factions, and more broadly, there were a couple kinds of Inquisitors. Since the Inquisition themselves defines what Heresy is, and only another Inquisitor could theoretically persecute another Inquisitor; There is no higher authority than the God-Emperor himself... That some Inquisitors would consider themselves 'Puritans' and others, 'Radicals,' in a broad sense without dipping into fluff-specific lore. Radicals would go so far as to try to control Daemonhosts and use forbidden knowledge, secrets, pacts, etc in order to do what cannot be done normally, in order to ultimately serve the God-Emperor more thoroughly in their eyes. However, they are rather vehemently opposed in various Inquisitorial Conclaves by other more .. 'Puritan,' Inquisitors, thus creating the inner-conflict of the Inquisition and thus a premise for the game.
One might presume Hazlan is following a similar gist, considering the fact that it's extremely easy to superimpose a Warhammer 40,000 Gothic Horror mindset on Hazlan, and you can morph just about any Warhammer 40,000 quote into a fitting quote for Hazlan. God-Emperor just becomes Divine Emperor, the Machine Cult of Mars just becomes The Red Academy, and bam.