Most of those who suffer from those tax do NOT have any alternative to their heavily-polluting cars. Rich people can pay such tax or go full EV but you cannot compel the poor to pay such taxes that will make them just poorer.
When you already have trouble feeding yourself and your family, you go crazy and you vote Macron out. Believe me, if Macron keeps lowering the taxes on the extra rich and insists on making the poor pay high taxes for indispensable fuels, we'll get the far right pretty quickly and a far, far worst government in power that will happily destroy any environmental regulation. We've probably passed that point already but there isn't many other options but to force Macron to stop his crazy politics (he lowered the tax on capital gains to a point where I pay far less tax on my stock gains than on my actual work, it's really absurd).
It's a about the email exchange between by the author of the fuel tax and the guy who introduced the law (if I recall correctly) in which they admit the tax is only a way to recover the tax revenue lost after the government decided to keep lowering employer taxes (aka C.I.C.E). The fuel tax was required after the Paris Summit (which took place before Macron became president) and the current government took it as an opportunity to switch the tax burden from the biggest companies (the ones that benefits from the CICE) to people who can't afford clean vehicles.
I'm a yellow vest only because I care about the environment.
I was in most of the demonstration and believe me, we share a lot between ecologists and the poor workers who cannot bear the burden of the transition. I come from a "milieu social" (don't know how to translate) where you pollute 100 times more than the poor and be praised by Macron for being part of the "startup nation", "those who succeeds vs those who are nothing" etc.
Macron doesn't really care about the environment (ask Nicolas Hulot!).