Liberals "fear" Bush because they can't face the reality that bin Laden and other terrorists are truly evil.

It's called "reaction formation," and Answer Girl has a definition: 

Behavior or emotion that is the polar opposite of the way someone is or should be feeling, because the authentic emotion is too frightening to deal with. 

Despite ample evidence to the contrary, liberals still believe that poverty and ignorance are the root causes of terrorism, and that if we could just educate the poor savages and lift them from poverty, they would turn away from jihad and sip lattes and discuss Chomsky. 

Bin Laden is educated and born to wealth, and the idea that, rather than misguided, he is actually evil, is too scary to consider. So to prove to themselves that they are brave after all, they oppose Bush at every turn, "speak truth to power," and pretend to be persecuted while their subconscious hides under the bed.

They cling desperately to their "reality," which explains their vitriol against any who disagree with them, especially those who are supposed to agree, like Senator Lieberman.

This psychosis also explains why it's pretty much impossible for conservatives to find middle ground, and it's the reason liberals must be defeated in the upcoming election and as long as the Islamo-Fascists exist.