As to Pat Buchanan, I don't think he's a Nazi Sadistic, to me he seems a moral crusader, or a moral enforcer. He seems a good man.
But while I hold very strongly to my on morals, simply put the government is to prevent me enforcing my beliefs on others and them theirs on me.

As to been a liberal, well no I wouldn't be, and its not really an insult over here to be one.
Personally I wouldn't agree with the Neo-Con philosophy, in the end it stirs up resentment against the US which is a bad idea.
As to democracies not fighting each other. Thats not quite true.
Off the top of my head Ireland fought Britain for independence and we both had democratic governments. Oft times patriotism causes wars.
As to trying to topple non-democratic governments, on paper its a laudable goal. But as places like Iraq shows it often causes devils bargains to be struck with dictators and despots. Its best to let people free themselves.
To encourage them to otherthrow their oppressors.

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"Better to die on you feet than live on your knees" - Emilio Zapata