On the growing anger over badly drawn cartoons

Here are the cartoons that have caused quite a stink in the Muslim World.

and

Here is a cartoon that has not caused a stink in the West.

and

Here is Britney Spears trying to create a stink. Perhaps religious fanatics in the West will be led by this to burn her records.

Is there a difference and what is the difference between Judaism, Christianity and Islam that sparks a varied reaction to acts of defacement committed in the name of free speech?