This is the power of fascist movements. Everyone outside the movement is enemy and deserves no regard. It's about loyalty in accordance to dominance hierarchy. That is to say, the lower ranks are loyal to the upper ranks, though not vice versa.

Eventually everyone in the lower ranks ends up on the undesirables list and packed onto the cattle trains by enforcers from the next tier. The enemy from within narrative helps keep the lower ranks from questioning the cause.