The secret realization that the first of these propositions is true (overestimation of the extent that their worldview is shared by the public) is the real reason why the political left is so pathologically anti-American. America is, at its heart, an ideology. It is a set of beliefs about society, government, and man's relationship to them both. This ideology is despised by the left, who cling to a collectivist set of ideas that are at odds with the ideology of America.
The liberals know themselves to be ideological strangers, adrift in a nation that still reveres ideals that are anathema to the left. This is why they go to Baghdad and badmouth our president. This is why they burn american flags at their rallies. This is why they write articles about how terrible its been for them to live in post 9/11 America...with all of the flag waving and hymn singing going on here. This is why they fly off to Europe and tell the socialist sheep there how much better Europe is than America.
I alternate between anger and pity when I contemplate their situation.
I think you missed it slightly. The grand divide is that the liberal measures a man by his relationship to his government. A constitutional conservative, measures his government by its relationship to men.