"Radicalization" is one of those unhelpful euphemisms. What it actually means is "Muslim extremism". I think it's important to face problems and to call them by their names.
> Of the 697 Channel cases, the most common were cases referred due to concerns regarding right-wing radicalisation (302; 43%), followed by Islamist radicalisation (210; 30%).
That is true, certainly in the context of France, and even more in the context of this article.
The far right is not carrying out terrorist attacks and they do not behead teachers. The problem France (and Europe) has is not with the far right, which relative expansion is by and large a reaction to muslim extremism and what is seen as uncontrolled immigration.
Of course some people will attempt to bundle both in order to avoid pointing the finger at muslim extremism because then they might face, oh no, accusations of "islamophobia". This is what is not useful at all.
Your reply dilutes and try to avoid the key problem.