The Palestinian textbook that I discuss at Jihad Watch also explains why anyone who leaves Islam deserves death:
“The logical reason for executing a person who abandons Islam is the following: There is nothing in Islam that comes in contrast to human nature. Whoever joins Islam after recognizing its truth and after tasting its sweetness and then abandons it – is in fact rebelling against truth and logic. Like any other regime, Islam has to protect itself therefore this punishment [execution] awaits the person who abandons it, because he is spreading doubt about Islam”¦
“Abandoning Islam is a crime that warrants a severe punishment”¦ [The phases of punishment are]:
“Urging [the sinner] to recant immediately”¦
“Warning him of the implications of his persistence in abandoning Islam, namely warning him that he will be executed.
“Execute the sinner if he persists in [his decision to] abandon Islam”¦”
Christian missionaries, meanwhile, are merely agents of the Great Satan: “Missionaries are one of the Western institutions used for intellectual invasion of the Muslim world. They tried to get the Muslims out of Islam by weakening the faith in their hearts and accepting the Western way of life. Outwardly they call for adopting the faith of Jesus, but in reality they try to facilitate the Western intellectual invasion of the Islamic countries”¦ The missionary organizations throughout the Islamic world tried to weaken the faith in the hearts of the Muslims, to spread secular ideas to replace Islamic ideology and to pave the way for the occupation of Islamic countries and strengthening Imperialism in them”¦
“The missionary movement left deep impressions in Islamic life, such as:
“Admiration and adoption of the Western way of life”¦ Materialistic and exploitative Western criteria and values and their understanding of life was common to the point that many Muslims yearned for it and turned to Western culture and literature.
“Weakening the Islamic spirit of the young generation as a result of weakening the faith in their hearts and the acceptance of contagious Western ideas and principles. Capitalist, Communist, and atheist ideas spread among the Muslims”¦
“Giving the educational system in the Islamic countries a Western flavor. The missionaries, with the help of Imperialism, were able to turn their philosophy and culture into educational foundations in many Islamic countries. Western history and culture became the main source of education and science-learning for Muslim children”¦
“Defamation of Islamic history and the life-histories of the Muslim Khalifs, and presenting Islamic history as [a series of] wars, conflicts, civil wars, revolutions, battles over power, and repression of citizens”¦
“Faulting Islam, its Messenger, and the truth of his prophecies, and spreading misleading ideas, such as the claim that Islam expanded by the sword and by coercion. Also, faulting the divorce laws and polygamy and depicting Islamic legal punishments as inhumane.”
Imagine! Stoning and amputation inhumane! The idea!
All this, needless to say, is an extended apology for Sharia and the terrorism that radical Muslims justify on its basis.