I'm not a Climate Denier, and I believe that Global Warming is due, at least in part, to human behavior. But I'd also point out that while we have ALTERNATIVES to fossil fuels, we do not have a SUBSTITUTE for fossil fuels, at least not as of now. And we're not on the brink of having a substitute, either. Green New Deals need to go forward with that reality.
We actually have common ground for once! And greens are misreading the public mood by calling for phasing out meat-eating, planes, and cars. Most people (myself included) have absolutely no intention of changing our lifestyles, nor do we wish to pay higher prices for electricity due to a carbon tax. Anyone calling for these changes will risk political suicide at the ballot box, if not during the primary, then most definitely in November.
Just ask former PM Julia Gillard of Australia how her carbon tax ultimately fared.