Holy shit. Here we go.
Sure, we know about the obvious examples, they're written across the history books in blood and bullet holes. Racism, genocide, horrifying caricatures on propaganda posters.
But They have figured out that the same technique that works so well for getting people whipped into a murderous apocalyptic frenzy, can be used sell you cars, or hamburgers, or computers.
"The heart of America ain't in Hollywood! It's right here in [insert name of small town]!"
"You can listen to what I have to say, or bury you head in the sand with the rest of the sheeple!"
"You have a Nintendo Wii? Are you a toddler or just a retard?"
Why It Works:
Basically, we're hard-wired by evolution to form tribes. The more stress we feel, the more we feel love and attachment to those who look and sound the same as us, and the more we feel hatred to those who don't. It's just an old survival mechanism, since the ancient guys who didn't show that kind of blind loyalty were killed off by the fierce tribes formed by the ones who did.
So today we get that petty dehumanization of everybody outside of our group ("hippies," "rednecks," "fundies," "geeks," "douchebags," "libs", "cons," "fags," "breeders," "infidels," "towel-heads," "honkies," "darkies," "players", "haters").
WEST SIDE SUCKA
They can play on those old, primal urges for even the most retarded of results, such as fierce brand loyalty (the PS3 vs. 360 vs. Wii flame wars will make you claw your eyes out).
But to really make this one work, They can't just define your group, but have to define your group as the elite group, a shining beacon in a world full of weak-minded walking turds. The items on this list work best in combination, and you'll see in that the element of mockery and insulation from opposing viewpoints we talked about earlier (why listen to the viewpoints of those lesser sheeple?). Often this is combined with siege terminology ("The whole country has gone to hell, but we've got to stand up for common sense, folks! It's us against the world!")