Little Mosque On The Prairie
A Muslim can not convince another Muslim to leave Islam unless they intend to kill him or her once they have done so. The same applies to a Muslim who abandons Islam after being convinced to so by a non-believer; he or she must be put to death immediately.
You may remember Abdul Rahman, the forty-one years old Afghan who, in 2006, was discovered to have secretly converted to Catholicism and was sentenced to death.
Rahman’s life was saved only after an international outcry and he was allowed to emigrate to Italy to escape the death that many religious leaders in Afghanistan and Canada demanded for ostensibly humiliating Allah. A Canadian imam said on television that apostates like Abdul Rahman, “deserve to die because of the embarrassment they cause his (sic) God by leaving his perfect religion.”
Some religious leaders demanded that he first be tortured and mutilated before being crucified, in keeping with their interpretation of what Pharaoh wanted to do to his magicians after they abandon their god for Allah, as being what Allah wanted them to do to apostates:
20:71 He (Pharaoh) said: “Do you believe in him before I give you leave? It must be your chief who has taught you magic. I shall then cut your hands and feet on alternate sides, and I will crucify you upon the trunks of palm trees, and you will certainly know whose punishment is sterner and more lasting.”
A Muslim is always a Muslim and only death, which believers are expected to deliver on the spot should a Muslim leave the fold, can separate him or her from Islam. Both Allah and His Messenger are of one unequivocal mind on this matter.
4:89 They wish that you disbelieve, as they have disbelieved, so that you will all be alike. Do not, then, take any companions from them, until they emigrate in the Way of Allah. Then should they turn back, seize them and kill them wherever you find them; and do not take from them any companions or supporter;
The Prophet said:
If a Muslim discards his religion, kill him (Bukhari: 4.52.260).