primary target of Ordo Hereticus not Chaos?
after reading some Dark Heresy fluff, I am of the opinion that the Ordo Hereticus deals mainly with non-Chaos threats
unorthodox versions of the Imperial Faith (similar to the Spanish Inquisition)
factions of the Mechanicus in favour of progress
mutant insurrectionists (mutated not by the warp but by toxic waste or radiation)
advocate of any form of social change
the 3 main targets of the Ordo Hereticus are mutants, witches, and heretics.
rogue psykers (the "witches") are relatively rare, only a fraction of heretics are chaos followers, and most mutants are the result of exposure to toxic waste in Imperial hives.
once rogue psykers become gateways for daemons, the Ordo Malleus comes in
is there any GW or BL fluff that might contradict my view, which is mostly based on Fantasy Flight fluff?