I follow the case on the French Media.

The fact is most of the people in jail are from Foreign origin, from Africa mainly… So is it racism? No.
As he didn’t say to kick them all out, he just mentioned a fact, to avoid what happened in UK about the search of Muslim is seen by some as discrimination in ignoring that the suicide-bomber were Muslim. So in UK better to waist you time in searching equal number of Muslims and non-Muslims than to focus on the potential murderers.
Not that I am convince of the success of such search things anyway…

Now, you can research why these French from African Emigration are in jail and not the French from Asian Emigration? So you will need more social-cultural studies and then pull together some efforts in favour of the ones who go for easy money instead of studying at school… But again, that is statistic…
But do you need to segregate the different French by origin, religion, sexuality and others skins colours? No.

What is the use in UK of such data: None. Perhaps it can be use to marketing food and clothes? More pork meat needed as more Polish? But in term of political action?

Now, why the French are allergic to Ethnicity/religious statistic?
As mentioned, the French Ideology: You are French, so equal so no need of such data.
Second, can you imagine if such statistic and data would have been available to Petain/Laval//Hitler with the Jews? They did a pretty good job with the Communist folder…
The Anglo-Saxon model (know in France as Communautaire) is not what French Ideology wants to produce.
The French see it as divers communities living side-by-side but not together…
The French model is the one from the Birth of the Republic, French because you have the French values… It is far more demanding than the Anglo-Saxon one which just request a good neighbourhood…
Is the French ideal? No. Is it idealistic? Yes.
That is why I prefer it, but as a French, I am not really fair.

In this case, it was not an attack on freedom of speech but a politically correct attack on somebody controversial.

By the way, all complain were withdrawn, excepted one…