The definition of satire - and I believe Charlie Hebdo is considered to be, and considers itself to be, a satirical magazine - is:
"the use of humour, irony, exaggeration, or ridicule to expose and criticize people's stupidity or vices, particularly in the context of contemporary politics and other topical issues."
So satire has a serious purpose and often uses shocking and controversial images to bring home its message. But what is the artist trying to expose here - what is the message? I don't think there is one - it is just a shocking, horrible image that has absolutely no purpose, other than to disgust and shock.