When Charlie Hebdo cartoonist Coco thought back and drew for a new documentary about the slaughter she survived 10 years ago at the French satirical journal, the memories that streamed from her marker pen were all black.

What’s more important, the freedom to mock, or protection of what many hold sacrosanct? After the Charlie Hebdo massacre, France opted for the former. But that may be shifting.

Terror attack on French satirical magazine united the Western world in defence of free speech, but a decade on some claim 'the killers have won'