Even if true (which there is no evidence that it is), many more have died by driving up the costs of our fuels - thus causing those on a limited budget to be deprived of air conditioners in the summer and heating in the winter. Add on top of that the rerouting of food supplies to create ethanol - thereby driving up the cost of food - you have the leftist Greenies murdering more people through their social engineering policies than the alleged deaths due to phantom AGW.
I understand what you are saying. But I suspect that what you say, talking about cause and effect, unintended consequences, etc. is too much for liberals to understand. Liberals prefer short slogans rather than nuanced detailed discussions about the ramifications of their policies.