Propaganda might be defined as getting people to believe exactly what you want them to believe by gently but persistently lying to them. When an opinion hardens into a principle which coalesces into a doctrine, the world becomes less flexible, less amenable to change and more susceptible to violent opposition to it. Most people don't take the time or expend the requisite effort in order to unearth the truth - whatever the truth is. Jack Nicholson's famous line from 'A Few Good Men' still reverberates "You can't handle the truth!"
The plural 'you' perhaps. And, quite probably, we can't. But Western style democracy gives us the platform from which to try, which is why Wikileaks is tolerated, students can protest loudly over tuition fees and the British prime minister is on record as asserting "I am proud to be a Zionist".
The long Damoclean shadow which is Iran will present the free world with the next significant Doomsday scenario of the 21st century.
I found these two clips illuminating since they offer two separate propagandist perspectives. Iranium - buttressed by and weighted politically by 'people who know', is rebutted by a soft, dewy-eyed, we-wouldn't-harm-a-fly response, the latter's effect rather spoiled by images of bloodstained Palestinian children and the inevitable side-swipe at Israel.
Whatever remains of my hot prophetic blood, if not boiling, still gently simmers.