Not letting an extremist party with 20% or unfortunately even a tad more into power is not sabotaging the popular vote? Each party is free to form a coalition or not, by their conditions and principals.
The party has clearly shown and expressed that its anti-democratic. I mean, come on, you know you are too much Nazi if even Le Pen doesn't want to continue coalition with you [1], lol. Funny btw also how the NSDAP cried ANTI-DEMOCRATIC before they did what they did.. rest is history.
Besides that, stop dreaming on, we have too many far rights, but the 20% you call popular vote is still at least half protest votes, barely supporting most points of that party, but so frustrated with the other politics.
[1]: https://www.bloomberg.com/news/articles/2024-01-25/france-s-...