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I'm not sure that they're technically "lying". To lie, you have to know, or at least have good reason to suspect, that what you're saying is untrue. I suspect that many of them literally believe this shit, because it's what they hear on Rush and Sean and O'Falafel and get via blast email from the RNC's many front groups that put together and coordinate these bullshit smear campaigns, and these people are stupid, desperate and hateful enough to buy it.
But yeah, either way, it's pathetic and despicable, and indicative of the degenerate state that the GOP has devolved into since its turn to the far loony right in the mid-60's. These are people who literally refuse to grow up and accept the modern world, where white Christian patriarchs don't rule everything, and stupid white male racists aren't their enforcers of the social order, a view of the world that they were brought up to believe in as the natural order of things, and assumed would be so forever. They CAN'T STAND that it no longer is true, and their desperate attempt to restore it is what, I truly believe, ultimately drives this manic creepiness.
They are today's dinosaurs--outdated, irrelevant, obsolete, and dying.
And deep down, they all know it. People tend to know when they're dying, much as they try to fight and deny it. Some just do so more gracefully than others.