I understand the economics just fine, thanks, and one of the big proponents of the carbon tax is republican economist Greg Mankiw (see Pigou Club link).

If I were to respond in kind, I would say that libertarianism seems to be a willful ignorance of the very concept of a market externality, as understood by mainstream economics. Certainly, reasonable people can agree to disagree on what specific things constitute externalities in which cases, how bad they are, and what measures, if any, should be taken to correct them - and indeed if those corrective measures are worse than the problem they cure.

However, denying the very existence of factors that are not taken into consideration by a free market seems to be letting your beliefs get the better of reason. And comparing any government intervention with communism is a bit beyond the pale, really.