According to MSN News, a Catholic activist by the name of Bill Donohue called the attack on Charlie Hebdo "provoked by religious intolerance." Well, Bill, you got that much right, but little more.
"Had he not been so narcissistic, he may still be alive... it would never occur to me to deliberately insult Muslims by trashing [Mohammad]," he goes on to say.
Satirical depictions of political and religious figures isn't narcissism, nor is supporting or working for a publication that does such, and my understanding of Charlie Hebdo's material is that they are generally equal-opportunity satirists. They didn't isolate just Muslim religious figures but instead drew bead on a variety religious figures.
The only religious intolerance I see is from the Muslim and Catholic extremists who support the attack.
Resorting to violence to attack words is... weak. It gives the impression that your opposing side is incapable of generating words strong enough to counter the attack on your own beliefs.