Ghouls and Nazis - BBC Reporting

"unlike words which are absorbed slowly, with time for conscious deliberation, and which our conscious mind can resist with contrary evidence, there are no defences against these visual images. They are absorbed by our unconscious mind in less than a second and they impact centres of emotional processing directly and powerfully. We know how difficult it is to change someone’s opinions with a direct strategy using factual evidence, but this strategy enables ideas to bypass all rational defences as if they were not there."