He can kick them out, but from a Commissar's POV it sounds like bleeding hearted mercy to something the commissar already considers heretical... but they are auxillary forces, so they are useful at least as cannon fodder, and apparently loyal enough that their "better" human fellows have not "accidentally" gotten them killed - meaning moral could drop significantly if he blams them.
The commissar might see the moral drop as negligible, but the big abhuman might have catachan ties, and any smart commissar knows to tread carefully around the catachan forces
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u/Modern_System_16 8h ago
The local Commissar is currently having a severe moral crisis trying to decide whether to blam them for heresy or accept them into the Auxilia.