Wikipedia Definition of Apostasy in Islam:
Apostasy in Islam is commonly defined as the conscious abandonment of Islam by a Muslim in word or through deed. It includes the act of converting to another religion or rejection of faith to be irreligious, by a person who was born in a Muslim family or who had previously accepted Islam.
https://islamqa.info/en/20327 – Islam Questions and Answers:
The evidence that the apostate is to be executed is the words of the Prophet (peace and blessings of Allah be upon him): “Whoever changes his religion, execute him.” (Narrated by al-Bukhaari, 2794). What is meant by religion here is Islam (i.e., whoever changes from Islam to another religion).
The Sharia – the foundation of the faith of Islam, its legal code – because of their Prophet’s statement, calls for the execution of ALL those renouncing Islam. This is a direct contravention of British and international laws and is the reason why this campaign started – so as to ensure that Muslims reform the Sharia and legalise apostasy. The aim is to lawfully defend apostates and to legally call to account all politicians, lawyers, Imams and others who threaten them. Quotes below are from a number of texts concerning apostasy: The Reliance of the Traveller – edited and translated by Nuh Ha Mim Keller (a classic text on Sharia)
Page 595 “o8.0 APOSTASY FROM ISLAM (RIDDA)
(O: Leaving Islam is the ugliest form of unbelief (kufr) and the worst…
o8.1 When a person who has reached puberty and is sane voluntarily apostatizes from Islam, he deserves to be killed.
o8.2 In such a case, it is obligatory for the caliph (A: or his representative) to ask him to repent and return to Islam. If he does, it is accepted from him, but if he refuses, he is immediately killed.”
Freedom of Religion and Belief – Edited by Kevin Boyle and Juliet Sheen 1997
Page 9 “…the individual has the right to ‘replace one’s current religion or belief with another or to adopt atheistic views, as well as the right to retain one’s religion or belief’. But there is no Islamic state that will formally accept that position.” (Website editor’s emphasis)
Law Reform in the Muslim World – Norman Anderson 1976
Page 222 – What of the Future?
‘I would also expect a certain softening of the law which at present prevails in regard to “apostasy” from Islam…’ (Website editor – no sign yet, hence the campaign…)