I've known Prince Charles-Philippe d'Orleans for a number of years now through the work of the Order of St Lazarus. When he speaks of his Christian faith (as he often does in the Order) it is always straight forward and powerful. He's to be commended for not being caught up in some of the strange reaction to the Paris terrorist outrages. Basically, because of the whole tone of the magazine, he has never been a supporter of it and isn't going to re-write history now. Certainly, the the "cartoons" I've seen don't appear to have been particularly clever or amusing, rather just offensive for the sake of it. Basically, his attitude is:
To honour the victims - yes. To honour the magazine - no.
You can read his statement on the Royal Family of France site. The site is in French but the online translation should give you the jist of it.
The modern world is very confused about freedom of speech and all our other freedoms. Often its presented as the freedom to do whatever anyone pleases but this is never really the case.
However, without a basic philosophy - which used to be the Christian Faith - the limits imposed on people's freedoms become arbitrary. Thus, there is no freedom for a devout Catholic (or a devout Muslim or a devout Jew) not to have their deeply cherished beliefs viciously ridiculed for no reason whatsoever.
There is no freedom for Muslim women to wear the burqua in France.
There is freedom in this country to terminate an unwanted child more or less on demand; while there is no freedom for midwives to continue working in their jobs in the NHS without being involved in abortions. (a freedom promised them when the abortion act was introduced). To say nothing of the curtailment of the freedom to actually be born and live for those unwanted in the womb.
So, like Prince Charles-Philippe, I'm uncertain what freedoms are being called for by some of the reaction in France and elsewhere.