The freedom to question, to expose, to mock ultimately makes institutions, belief systems, and leaders stronger. The resort to murderous vengeance for the crime of drawing and publishing cartoons ...

By publishing cartoons on the Russian Tu-154 plane ... Charlie Hebdo once again demonstrated what "democracy and freedom of speech" really is, Chechnya's head Ramzan Kadyrov said.

Then we respond because we are convinced that religion has no place in the political arena ... The attack ignited debates over the right of freedom of speech. Some - including Pope Francis ...