Probably most people who have studied unofficial 911 literature are familiar with the idea of a left gatekeeper. If you don't, remember that Google is your friend.

However, I see recurring evidence of what amounts to HATEKeeping. By this I mean, smear type of rhetoric, broadly applied to an entire group, that paints them as hateful. The net effect of this is that it serves to divide the public, by encouraging primitive, emotional, tribablistic 'thinking' about the evil other. It thus inhibit real communication, which could lead to united political action (say, e.g., against the clear and present danger of plutocracy).

I'm sorry that I don't have the time to develop this idea, more. I will make a few more points, and hope that I inspire somebody to look more carefully into this.

Points:

1) Imputing hatred to others is just one way to generate hatred for the others. There's also speaking of the others in a contemptuous tone of voice. This is certainly done a great deal on the radio, by right-wing gasbags such as Rush Limbaugh, and a misanthrope I've heard in the NYC area called Bob Grant.