The point raised in your link about "Why would Muslims be more outraged by cartoons in a Paris magazine than by hundreds of thousands of Muslims killed by Washington and its French and NATO vassals in seven countries during the past 14 years?" doesn't make sense considering the recent attack in Copenhagen, a planned assault against Jylland-Posten from a few years back, and the murder attempt of one of the Danish cartoonist. Unless you want to believe they were all false flag operations, but that's really going far.

I'll also point out that the Hyper Casher gunman was linked to the Kouachi (and even gave a TV interview).

The timing of the suicide, on the other hand, is certainly odd.

The claim would be a little more credible if there wasn't already a history of street demonstrations around the world calling for this type of attack (to say nothing of the celebrations afterward) and multiple threats of violence against the staff... also if he didn't drag a few 9/11-truther allusions into the matter.