I'd start off by openly stating the obvious ... that "Charlie Hebdo" has a habit of producing vulgar, obscene, blasphemous filth ... and that such things are the products of diseased minds ... and that they appeal to an audience of diseased-minded people.
I might go on by praying to God for their repentance and conversion.
What about you? How do you respond to their filthy, vulgar, obscene blasphemy?