Don't these "scholars" know that the best way to defend the prophet is by calling for the Afghan man's release and standing for his freedom to choose whatever religion he wants?
These "scholars" are aware of Sahih Bukhari: Volume 9, Book 84, Number 58.
Some Zanadiqa (atheists) were brought to 'Ali and he burnt them. The news of this event, reached Ibn 'Abbas who said, "If I had been in his place, I would not have burnt them, as Allah's Apostle forbade it, saying, 'Do not punish anybody with Allah's punishment (fire).' I would have killed them according to the statement of Allah's Apostle [Prophet Muhammed], 'Whoever changed his Islamic religion, then kill him.'"
The vast majority of Muslim religious leaders will never stand for the freedom of religion since Islam itself doesn't support that position.