Let's be clear: I agree there is no justification whatsoever for gunning down journalists or cartoonists. I disagree with your seeming view that the right to offend comes with no corresponding responsibility; and I do not believe that a right to offend automatically translates into a duty to offend.
A secret document purporting to expose an undercover Muslim conspiracy to take over schools in Birmingham hit national news recently, prompting journalists to fall over themselves heralding a sinister 'Islamic plot', while eliciting both public statements from the Prime Minister and snap Ofsted inspections for the places of learning allegedly targeted by the conspirators.