Charlie Hebdo has the right to utilize free speech. However, sane members of the general public should employ their rights to free speech to condemn Charlie Hebdo’s juvenile fetish for trivializing the death of Muslim children.
Charlie Hebdo will say they are actually making social commentary. Again, this is easy to test: Would they ever depict the death of French or American children in the same fashion? Of course not.
Thus, Charlie Hebdo’s true motive is to toy around with images of dead Muslim children. I’m sure they think they are being very clever by disguising it as social commentary, but their true motives are pretty clear.