Under what circumstance might propaganda unintentionally hurt rather than help a cause?

Propaganda can hurt someone instead of help because propaganda normally tries to make something seem superior which can then hurt maybe an individual ,or group, because they might not fit the ideal type of that propaganda.

Explanation:

    Take the Holocaust as an example. THIS PROPAGANDA was "made" to hurt a group of people. A very specific one, in fact. This propaganda was to discriminate Jewish people, which led to Jewish people being kicked out of their homes, killed, and even tortured all because they were "different" from the ideal type of the propaganda.

seeing as no choices were provided, i'll do my best to answer it from knowledge.

job specialization promotes work ethic to the person doing the job. he/she may be strong in the arms and able to lift things, specializing him/her in a job where you lift and carry.