Its deeper than just putting a green tax on fuel, hence the reason the protests are still going on after the government capitulated (or at least postponed it).
The protests are cross party, far left standing with far right and those in between,. Each have different gripes .
A common thread is Macrons tax reforms. He is trying to balance his tax reforms using robin hood tactics. For example, on the one hand, the fuel tax increase will hit the less well off, on the other hand a reduction in tax on money shipped out of the country benefits bankers and other financial movers and shakers.
He is also trying to shake Ameli, the french health service and labour laws, a fiercely protected right in france.