in a book stéphane charbonnier , known as charb , finished just two days before being murdered by jihadist gunmen he argued that left-leaning intellectuals who denounced the cartoons in the satirical magazine were ` ridiculous demagogues ' for doing so .
in the short book , extracts of which are to be published today in weekly magazine l'obs , he writes : ` the suggestion that you can laugh at everything , except certain aspects of islam , because muslims are much more susceptible than the rest of the population .