Apostacy:-
              
Changing one's mind after entering 'Islam' is punishable by decapitation and death. It is the only major 'religion' ( actually a CULT belief system; Cult of Muhammad) ever, that ordains the murder of a follower who wants to change his/her mind, by the 'divine' decree of their god, Allah.

Any intelligent reader has the right to ask a very simple but extremely important question:

If Muhammadan Islam is such a sublime, spiritually stimulating, intellectually inspiring, compassionate and merciful belief system, why then resort to the extreme violence of murder if someone wants out?
After all, according to so many of the Meccan verses of the Quran: It is their loss; so why not let them be ?


Sahih Al-Bukhari HadithHadith 5.632        Narrated byAbu Burda
That the Prophet sent his (i.e. Abu Burda's) grandfather, Abu Musa and Mu'adh to Yemen and said to both of them, "Facilitate things for the people. (Be kind and lenient) and do not make things difficult (for people), and give them good tidings, and do not repulse them and both of you should obey each other." Abu Musa said, "O Allah's Prophet! In our land there is an alcoholic drink (prepared) from barley called Al-Mizr, and another (prepared) from honey, called Al-Bit." The Prophet said, "All intoxicants are prohibited." Then both of them proceeded and Mu'adh asked Abu Musa, "How do you recite the Qur'an?" Abu Musa replied, "I recite it while I am standing, sitting or riding my riding animals, at intervals and piecemeal." Muadh said, "But I sleep and then get up. I sleep and hope for Allah's Reward for my sleep as I seek His Reward for my night prayer." Then he (i.e. Muadh) pitched a tent and they started visiting each other. Once Muadh paid a visit to Abu Musa and saw a chained man. Muadh asked, "What is this?" Abu Musa said, "(He was) a Jew who embraced Islam and has now turned apostate." Muadh said, "I will surely chop off his neck!"


Sahih Al-Bukhari HadithHadith 9.17        Narrated byAbdullah
Allah's Apostle said, "The blood of a Muslim who confesses that none has the right to be worshipped but Allah and that I am His Apostle, cannot be shed except in three cases: In Qisas for murder, a married person who commits illegal sexual intercourse and the
one who reverts from Islam (apostate) and leaves the Muslims."


Sahih Al-Bukhari HadithHadith 9.37        Narrated byAbu Qilaba
Once 'Umar bin 'Abdul 'Aziz sat on his throne in the courtyard of his house so that the people might gather before him. ..He replied, "No." I said, "By Allah, Allah's Apostle never killed anyone except in one of the following three situations: (1) A person who killed somebody unjustly, was killed (in Qisas,) (2) a married person who committed illegal sexual intercourse and (3) a man who fought against Allah and His Apostle and deserted Islam and became an apostate." Then the people said, "Didn't Anas bin Malik narrate that Allah's Apostle cut off the hands of the thieves, branded their eyes and then, threw them in the sun?" I said, "I shall tell you the narration of Anas. Anas said: "Eight persons from the tribe of 'Ukl came to Allah's Apostle and gave the Pledge of allegiance for Islam (became Muslim). The climate of the place (Medina) did not suit them, so they became sick and complained about that to Allah's Apostle. He said (to them ), "Won't you go out with the shepherd of our camels and drink of the camels' milk and urine (as medicine)?" They said, "Yes." So they went out and drank the camels' milk and urine, and after they became healthy, they killed the shepherd of Allah's Apostle and took away all the camels. This news reached Allah's Apostle, so he sent (men) to follow their traces and they were captured and brought (to the Prophet). He then ordered to cut their hands and feet, and their eyes were branded with heated pieces of iron, and then he threw them in the sun till they died." I said, "What can be worse than what those people did? They deserted Islam, committed murder and theft." ..


Sahih Al-Bukhari HadithHadith 9.57        Narrated byIkrima  & 9.58
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,
'Whoever changed his Islamic religion, then kill him.


Sahih Muslim Hadith 9:29
"Command For Fighting Against People So Long As They Do Not Profess That There Is No Ilah (God) But Allah And Muhammad Is His Messenger: When the Messenger breathed his last and Bakr was appointed Caliph, many Arabs chose to become apostates [rejected Islam]. Abu Bakr said: 'I will definitely fight against anyone who stops paying the Zakat tax, for it is an obligation. I will fight against them even to secure the cord used for hobbling the feet of a camel which they used to pay if they withhold it now.' Allah had justified fighting against those who refused to pay Zakat." 

The fact that so many Arabs apostasized after the death of Muhammad, speaks volumes about why they became 'Muslims' in the first place:

Fear of Muhammad and his cut throat henchmen.