You may believe that Marine LePen is a mighty power here... but the "better" result this sh!tty party got is 21% with everyone on the line
France is a country that is really into center.. not too left at all and right side must be "republicaine" (not the same definition of your republican) ... extrem from both side doesn't stand a real chance here (so far)
She's not in power yet, but her power is growing. Twenty-one percent is a significant number. National Front was deep in the single digits not that long ago.
Why is that percentage growing? I would say that it is growing because more people are correctly realizing that France's pathological views on equality and fraternity (what you call republicanism) won't save their country. Most of the North African people who live in France have no intention of embracing the secularism that the French hold so dear. You can't "assimilate" that many of them. They would use democracy to get the kind of country THEY want. That takes numbers.
And so I ask again, what percentage of Africans are you willing to have in France, given that most of them would choose their god over France's secularism (which is basically Christian ethics without the church)?