Tolik, because you mention the Nazis. I have been watching “The Century of the Self” the whole day which is about how politicans and corporations learned to use propaganda just like the Nazis to manipulate the masses. The Nazi’s propaganda was the inspiration for the creation of the whole field of “public relations”.
I believe both major parties in the US will use public relations as much as possible to paint the others as the bad guys (just like political parties in every other country do of course). It will be just interesting to see how far they are willing to go.
At some point you get some small radical wings that don’t settle things by fighting with words. At that point it might be already too late to find unifying themes anymore. If those guys who manipulate the masses aren’t careful they open up a divide they can not control…
Alea iacta est ("The die has been cast")