Cognitive dissonance.
"Demeaning" is calling names like, oh, I don't know, "leftist scumbag."
The Giuliani campaign should emphasize its candidate's independence from traditional national Republican policies. Especially useful in this strategy is Giuliani's role in overturning a Reagan administration attempt to throw disabled people off the Social Security rolls, his prosecution of Republican elected officials -- especially his authorization for calling his boss, Attorney General Edwin Meese III, a sleaze, and his un-Republican views on many social issues of concern to New Yorkers, like abortion, gun control and bias protection for homosexuals.' - From the 'Guiliani Vulnerability Study - April 1993
That's one way to frame it. Another is that I know what I'm talking about, and I'm right about Giuliani. But that is something you will only understand eventually, and I'm not going to spend any more time trying to persuade you now, since facts don't affect your prejudice.