I have to say I had the exact opposite reaction. I was also intrigued by the depiction in the Manhunt series and read the manifesto as a result. In the TV show, Kaczinky is portrayed as a highly intellectual, informed, educated individual, mentally thwarting his interviewer in their debate on morals and politics. After building up that expectation of Kaczinky's intellect, the manifesto is an enormous disappointment.…
Interesting, because my pet theory is that what determines if people lean left or right is their belief in their own free will.
Those that truly believe they are completely free and autonomus from society and their environment will naturally favor right wing policies, but those that believe they are largely a product of their environment will favor left wing policies.
This belief is perhaps (probably) not always explicit but rather somehow implicit or 'felt'.