This article seems to be confusing muslims with arabs. Charlie Hebdo is only attacking religions, not arabs as an ethnic group. White catholics have been mocked, too, more than any other religion if you look closely at the history of that journal ; but, of course, attacks against catholicism often go unnoticed because, well, this is so common in France (and catholic extremists haven't murdered journalists for a very long time).
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This article seems to be confusing muslims with arabs. Charlie Hebdo is only attacking religions, not arabs as an ethnic group. White catholics have been mocked, too, more than any other religion if you look closely at the history of that journal ; but, of course, attacks against catholicism often go unnoticed because, well, this is so common in France (and catholic extremists haven't murdered journalists for a very long time).