It's not fucking heresy ffs this guy has less theological knowledge than a 13th century peseant.
It may very well be Warhammer 40k brain, the kind that cryptofascist dipshits get when they get excited about Exterminatus and want to say "heresy/xeno/witch" a lot to justify their genocide fantasies.
Which has in turn been embraced by this kind of guy (especially as the series went on to be less satire and portray the space fascists as heroes more frequently)
It may very well be Warhammer 40k brain, the kind that cryptofascist dipshits get when they get excited about Exterminatus and want to say "heresy/xeno/witch" a lot to justify their genocide fantasies.
I think you might be putting the cart before the horse here. Warhammer was trying to satirise these guys
Which has in turn been embraced by this kind of guy (especially as the series went on to be less satire and portray the space fascists as heroes more frequently)
no he's making an actual theological argument.
Not if he's making that argument against the pope's position, he has no standing to make any arguments for anything.