One needs to apply the same level of propaganda that was used against POST WAR japan and germany. As well as american (though mostly imagined) communism.
Problem is, that level of propaganda is not palatable to citizens of the current west.
After wwII there was TONS of book burning done by the winning side. The old ways had to be wiped out. Japan and Germany were not only extremely nationalistic and militaristic, but had been living under fascisim for decades.
They were completely unaware of what it was like to live in a world where they weren't the only legal government. Resistance was met harshly and thought was pretty well controled.
The same problem affects the world today, instead of nationalism its culturalism.
No one would ever say we should obliterate their beliefs...Never happen now-a-days.