In the UK the numbers of people referred for right wing vs Islamic extremism are pretty close.
https://www.gov.uk/government/publications/individuals-refer...
> 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%).
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.