Non Muslims lamely bring up this verse from the Qur'an- "kill all the disbelievers wherever you see them" not knowing it was addressed to Muslims in a battle, where the they, after years of oppression had to fight back and not particularly against disbelievers but just oppressors who didn't give them freedom of speech and freedom
to believe what they wanted to believe just the way till today, we're fighting for the same right
Now this would be an entirely different topic of discussion as to whether or not you personally agree or disagree with death penalty. The fact is that it IS a s system that the entire world is following, and that's another topic of debate for another day.
Murder is one of the greatest sins in Islam. There is punishment for that in the court of law as well and in the times when Islam came into being, there was no law so law was made against murderers.
It is important to know that all innocent lives are equal in Islam. There is no difference between the rich and the poor, the man and the woman, the free and the slave. All are equal in the eyes of Allah Almighty:
"...if any one slew any person - unless it be for murder or for spreading mischief in the land - it would be as if he slew the whole people: and if any one saved a life, it would be as if he saved the life of the whole people." (Noble Quran 5:32)"
And no, you don't get to decide who deserves death. There has to be a trial and a whole procedure excluding any bias or favour.
"Fight in the cause of God those who fight you, but do not transgress limits; for Allah loveth not transgressors. [002:190]
2178-179. O ye who believe! the law of equality is prescribed to you in cases of murder: the free for the free, the slave for the slave, the woman for the woman. But if any remission is made by the brother of the slain, then grant any reasonable demand, and compensate him with handsome gratitude, this is a concession and a Mercy from your Lord. After this whoever exceeds the limits shall be in grave penalty. In the Law of Equality there is (saving of) Life to you, o ye men of understanding; that ye may restrain yourselves.
They then say this implied that a murderer should get death as punishment. However, this verse implies compensation and equity. If a free man kills a slave then you don't kill a slave for punishment. It seems the verse is talking about equity. Anyway, it also says that remission can be made and monetary compensation could be taken. Makes total sense.
Our Prophet Muhammad (S) himself demonstrated the act of forgiveness and kindness when Hinda ate the liver of his beloved uncle Hamza ibn 'Abd al-Muttalib. It pained and hurt him and it was the perfect opportunity to exact revenge.
And verily, whosoever shows patience and forgives that would truly be from the things recommended by Allah. Quran, 42:43
As for those who leave Islam, there is NO verse in the Qur'an that says that there is a punishment for that, except BY ALLAH HIMSELF and his wrath.
"He who disbelieved in Allah after he has believed, excepting the case of one who is forced to make a declaration of disbelief while his heart rests securely in faith, but one who opens his mind wide to disbelief; on him is Allah’s wrath and he shall have a grievous punishment. (16.107)
"Those who believe, then disbelieve, then again believe, then disbelieve and thereafter go on increasing in disbelief, Allah will never forgive them, nor guide them to any way of deliverance. (4.138)"
A bedouin gave the Pledge of allegiance to Allah's Apostle for Islam. Then the bedouin got fever at Medina, came to Allah's Apostle and said, "O Allah's Apostle! Cancel my Pledge," But Allah's Apostle refused. Then he came to him (again) and said, "O Allah's Apostle! Cancel my Pledge." But the Prophet refused Then he came to him (again) and said, "O Allah's Apostle! Cancel my Pledge." But the Prophet refused. The bedouin finally went out (of Medina) whereupon Allah's Apostle said, "Medina is like a pair of bellows (furnace): It expels its impurities and brightens and clears its good. [Sahih al-Bukhari, Vol. 9, #318]
This was an open case of apostasy. But the Prophet neither punished the Bedouin nor asked anyone to do.
The apostates who WERE punished or killed was not because they left Islam, but because they were either murderers themselves or were causing a lot of distress in the land.
There are also these Hadiths used to mislead people. Some of them have been invented a few hundred years ago while others show the half truth. Whereas Ibn Khatal, who was without doubt one of the four executed on the fall of Mecca, was an apostate, he had also committed the crime of murdering his travelling companion. His execution was, therefore, obviously ordered as a result of his having been convicted as a murderer.
Islam came to us as an option, a new way of life of equality and monotheism. Those who freely chose this way suffered. Many still do. But Islam was never, and never will be a way to oppress people or lock down their opinions. Islam frees us.
Say to these Mushrikoon and Kafiroon): "O Al-Kafiroon (disbelievers)
"I worship not that which you worship,
"Nor will you worship that which I worship.
"And I shall not worship that which you are worshipping.
"Nor will you worship that which I worship
"To you be your religion, and to me my religion (Islamic Monotheism)."
"There is no compulsion in religion." Al Baqarah, 256.
P.S Kindly do not go off topic and do not claim anything without proof from the Qu'ran and do not post any abusive comment or it will be deleted, as I do not want a bad atmosphere.