Well, that does a pretty good job of 'splaining it. Arrogance and Hypocrisy have been the suicidal weapons of modern Liberalism. Is a Liberal just naturally a spoiled arrogant, hypocritical brat out of which spouts Liberal thought as a matter of course, or is Liberal thought and teaching presented in the public school system without much competition resulting in whole new crops of Liberals who didn't use their brain cells to reason things out? Which came first, the Liberal chicken or the Liberal egg? Is Liberalism merely a personality disorder that has been allowed to seek its level like water?
This is a great question and one that could be debated endlessly since it is, in effect, the age-old question of "nature vs. nurture".
If forced to choose, I'd say the latter is the cause, and the former is merely the dreadful result. Being a spoiled hypocrite strikes me as being more of a learned behavior as opposed to an inherent part of one's nature. When you have teachers that are on a constant vigil against having someone's baby dumpling's precious self-esteem shaken in even the slightest way and the teacher dare not tell them them they're wrong or lacking somehow, I'm amazed that the result could be anything else.
Surely the lack of competing ideas and an insistance on "political correctness" leads, ironically, to a kind of cookie-cutter conformity which seems to be the antithesis of the liberal notion of "individuality". (I can't help thinking about the young tattooed and pierced person who did it as a form of self-expression, and ends up looking like all of his or her tattooed and pierced peers who did it for the same reason, and it all makes me chuckle.)
There are many other things that reinforce the liberal mindset in school, but I don't have the time to get into them...I have to get back to work!
Of course, as we learn more about the structure and function of the brain, perhaps we will learn that liberals and conservatives are indeed born and not made, but I have a gut feeling the odds are against it. Time will tell, I suppose.