Verse 5:32 of the Quran is on capital punishment. It mentions two cases where capital punishment is allows.
The Qur'an legislates the death penalty for murder, although forgiveness and compassion are strongly encouraged. The murder victim's family is given a choice to either insist on the death penalty, or to pardon the perpetrator and accept monetary compensation for their loss.
Spreading mischief in the land is generally interpreted to mean those crimes that affect the community as a whole, and destabilize the society. Crimes that have fallen under this description have included:
• Treason / Apostacy (when one leaves the faith and joins the enemy in fighting against the Muslim community)
• Terrorism
• Land, sea, or air piracy
• Rape
• Adultery
The following verse, 5:33, applies to those that wage was against the Muslims. The verse prescribes death as one of the punishments but not as the only one. After the “Battle of the trench”, in which Jews living under the Prophet joined forces with the opposing army to wage war against him, the Prophet decided to exile the Jews that conspired against him. He did not kill them. Nor did the Prophet kill the pagans that lived in Makkah, who had been waging war against him for years, when he conquered it.
“Permission (to fight) is given to those on whom war is made, because they are oppressed. And Allah is able to assist them — those who are driven from their homes without a just cause except that they say: Our Lord is Allah.” (22:39-40)
“And fight in the way of Allah against those who fight against you, but be not aggressive. Surely Allah loves not the aggressors.” (2:190)
“And if they incline to peace, you must also incline to it, and trust in Allah.” (8:61)
Your conclusion that Islam declares war against anyone who isn’t a Muslim is incorrect. Islam teaches tolerance of other religions.
“If anyone of the idolaters seek your protection, protect him till he hears the word of Allah, then convey him to his place of safety. This is because they are a people who have no knowledge.” (9:6)
Allah forbids you not, with regard to those who fight you not for (your) Faith nor drive you out of your homes, from dealing kindly and justly with them: for Allah loveth those who are just. (60:8)
The Quran does not ask Muslims to fight and convert everyone to Islam. As can be seen from the following verse
“If they accept Islam, then indeed they follow the right way; and if they turn back, your duty (O Prophet) is only to deliver the message.” (3:20)
Let me continue by mentioning some of the sayings of the Prophet regarding tolerance.
“Beware! Whoever is cruel and hard on a non-Muslim minority, or curtails their rights, or burdens them with more than they can bear, or takes anything from them against their free will; I (Prophet Muhammad) will complain against the person on the Day of Judgment.”
"He who believes in God and the Last Day should honour his guest, should not harm his neighbour, should speak good or keep quiet."
"Whoever hurts a Non-Muslim citizen of a Muslim state hurts me, and he who hurts me annoys God."
"Anyone who kills a Non-Muslim who had become our ally will not smell the fragrance of Paradise."
Now that I’ve cleared up your misconceptions, I have to ask how you can judge an entire book based on four sentences? Have you read the Quran? Have you looked into the details of the verses you mentioned? How can one judge an entire book by just four sentences?
The fact that needs to be understood is that religiously oriented violence has by no means been confined to Islam. In the United States, abortion clinics have been bombed and their doctors shot because, to the perpetrators, the Christian Bible commands it. Jim Jones killed or required the suicide of his own followers at his camp in Guyana, and David Koresh did nothing to prevent the mass death of his followers at Waco. Lets not forget issues such as the molestation of young boys by priests at several different Churches, the cannibalism committed by the Crusaders during the first Crusade and the acts of the BTK killer who was the head of a church.
Muslims don’t blame Christians or the Bible for all these actions. They blame religious extremists.