Your original prescription seemed a little different:
My contention was that going back to pre-electric technology isn’t a requirement to mitigate climate change. Behavior change though is necessary, including diet and driving (although personally I don’t see switching to a Mediterranean diet as much of a sacrifice;the food tastes better and is also healthier, but much of human behavior is unfathomable to me, so what do I know.) That said, humans continue to demonstrate that they are fundamentally selfish, so in that regard future generations are likely to face a lot of the predicted dire consequences of climate change.
As for the topic at hand, a carbon tax usually coincides with some sort of tax relief or even straight up gov’t payment in return, so I’m not really sure why this faction in France are protesting.