The Leftist Disease: Frank Zappa takes the glass half empty to a ludicrously totalistic nihlilistic extreme

In this "tubechop" interview (i.e., excerpt from a YouTube video), the famous Dadaist musician Frank Zappa (1940-1993) joins an august list of well-intentioned thinkers in modern history -- Ambrose Bierce, Mark Twain, Oswald Spengler, Kurt Vonnegut, George Carlin, to name a few -- who went off the deep end by following the logic of their Western virtue of self-criticism into the darker waters of nihilism and pessimism.  In the above-linked tubechop, Zappa answers an interviewer's question asking him to expatiate upon whether there is superior life in the universe and what that might mean for the human race.

In the excerpt, Zappa articulates with succinct (and damning) precision the Leftist disease of mind that moves from a reasonably cynical jadedness about human nature (which even Plato and orthodox Christianity, among many others in history, share) into an unhinged and psychologically berserk condemnation of all Mankind which concludes with a wish for all humans to be destroyed, lest we, in our insane evil, become dangerous for "other environments" -- i.e., for environments other than our own earthly environment.  

With this belief, a Leftist like Zappa (whose disease seeps into the seemingly more rational psyche of the non-Leftist PC MC) has no coherent reason to defend his society from the destructive assaults of Islamic terrorism and the larger jihad that terrorism is meant to spearhead.