Re: During WW2...
I'm thinking....
Radicalizing propaganda does not work well on people who are happy, safe, or even apathetic. Agitprop generally only serves to move people away from apathy, in whatever direction they are inclined. If a person feels that the Mideast should be left to sort their problems, the Daesh videos will make them less sympathetic; however someone who feels that "The Man" has been giving them grief will see the same video and think "That's how you handle The Man!"
So, in short: If you want to stop Agitprop videos from radicalizing you citizens, stop shitting on them and making the Murdering Terror Bastards seem reasonable in comparison.