People are human before they are communists, or whatever -ist. Which means holding contradictory beliefs will cause anxiety due to its dissonance, even if you can "resolve" it through some convoluted means. You can trick your conscious mind, but you can't trick your brain.

In this case, the resolution they chose was anger at the men who they felt safe enough to attack directly while being vague enough that it could technically include the real predators even if they'd argue otherwise.