It might not be literally in the Quran, but you can't deny the fact the punishment is part of the Sharia law as practiced there. Is this then not wrong and despicable? Shouldn't you denounce the Afghani government for trying to execute a convert (well, he's not going to be executed but 10 bucks say that it wasn't a final pang of mercy but rather the worldwide attention this case got)?
But the first thing you do is post Quran excerpts to prove that Islam is, of course, once again, not to blame.
The fact that the geezer was almost put to death under such laws is an inherent cultural and societal problem over there in the Middle-East. I would like to see more Arabs and/or muslims coming to grips with this and instead of trying to defend Islam all the time would just recognize the damn problem