I'd like to repeat "The punishment for apostasy in Islam is not death if it is as a change of ones belief system only"

But you guys forget the point that the same punishment is quite clear in christianity and judaism also.

Deuteronomy 13:6-9 "If your very own brother, or your son or daughter, or the wife you love, or your closest friend secretly entices you, saying: Let us go and worship other gods (gods that neither you nor your fathers have known, gods of the peoples around you, whether near or far, from one end of the land to the other, or gods of other religions), do not yield to him or listen to him. Show him no pity. Do not spare him or shield him. You must certainly put him to death. Your hand must be the first in putting him to death, and then the hands of all the people."

2 Chronicles 15:13 "All who would not seek the LORD, the God of Israel, were to be put to death, whether small or great, man or woman."