34% is already lower than what they polled (and it will go down more as cities' vote get counted). Though, you are right, the normalization of Far Right IS scary af. But it's not a recent thing in France, it started nearly two decades ago, but surged to an extreme during the past few years esp with:
Bolloré (our own personal Murdock) bought more and more media, fired the journalists, and put propagandist in their place.
Macron started taking Far Right's talking points (immigration), language ('national preference', which is a concept that makes no sense) and methods (just two days ago, his party made, published and propagated on social media a fake 'NUPES' (name of the last Left Alliance) website to calculate one's future pension based on their 'program'. As it turns out, the calculations were not based off their program at all and was nearly always defavorable to the person)
Macron, when asked about the surge of Far Right, had only one response: bUt WhAt aBoUt tHe LeFt? (And goes on and on to try and sell a 'both sides' to try and make himself more popular. Spoilers: it didn't work) It's also why it's refreshingly suprirsing to not hear him bash 'theLleft' tonight, and instead call on everyone to vote against Far Right.