Freedom of Press is simply an extension of Freedom of Speech and it stands to logic that if one person is refused the right to be heard, why should we hear anyone? The battle against totalitarian rule will always be fought by democratic countries because there is no one in the world that wants to be oppressed. Nobody wants to lose their freedom. This wasn't simply revenge killings - by assassinating some of the most high profile figures in satire, the group behind the attack were sending a message about Freedom of Press both to and through the press. On the one hand it looks like a base act of archaic butchery, but on the other it's a very modern demonstration of media-aware and modern fundamentalism.
The content of Charlie Hebdo's cartoons is frequently distasteful and countless people have expressed their distaste for what they contain. We may disapprove of what some people say or print, but that doesn't negate the rights of anyone to express it. Satire is a tradition inherent in western culture, whose origins go back millennia. Some of the greatest and worst figures in history have been brought down by the power of the mirror it holds up to society, but who has the right to stop people from talking? To stop people from expressing themselves? No one. As long as there are thoughts in our heads, everyone has the right to make these known and it becomes the duty of their audience to support, argue against or simply ignore them. This open forum for debate is the very foundation for civilisation, not just democracy, and any attack on this, even in principle, undermines all societies and it is our duty to defend it, no matter what our opinion of its content.