wtf
Check this out.
http://www.faithfreedom.org/Quran.htm
If you're researching Islam, you can buy translated copies of the Quran and Hadith. Sorry, I haven't read either one, so I'm not familiar with their contents.
Yes, the sura you cite is indeed in the Koran, as are prohibitions against suicide.
The problem is that Islamic tradition (begun by Mohammed, for reasons I will explain) holds that the later authored verses of the Koran supercede the earlier written ones.
All the pacific verses like the one you cite are early, the verses about 'striking at the neck of the infidel' and 'making a great slaughter' are late.
Mohammed at first tried to sell his 'revelation' as an extension of Judaism and of the gnostic Christianity he was familiar with. When he didn't get any takers other than Arab pagans, he became a warlord and made war against Jews (Jewish Arabs! there were whole tribes of Arab Jews in those day) and Christians (there are still Christian Arabs, mostly outside of the Middle East),
and was quite successful at it.
Of course it wasn't just that he wanted to preach war after he became a warlord. He could have done that without establishing the scriptural hermeneutic that the later superceeds the earlier written. No, Mohammed had limited polygamy to four wives (worse for women than the monogamy prevailent among Christians, better than the unlimited polygamy prevailent among pagans and Jews, yes, Jews, in those days--it was only in the later Middle Ages under Christian influence that Jews finanally renounce the polygamy practiced by the patriarchs of the Old Testament), but he was
a randy old beast, and wanted more for himself (and all at once, since he
could have divorced a few and taken new ones, the limit was four at once), so he added a new, superceeding 'revalation' that Allah's 'prophet' should be allowed more wives.
Islamic scriptural interpretation is in one respect like good constitutional law, all built on precedent, with the founder's precedents (the Hadiths) being pre-emeninent. Unfortunately for the world, and particularly for those who have to live under Islam, the preeminent precedents in Islam are warfare, the beheading of surrendered enemies (what we'd call 'prisoners of war'), rape, pillage, pedophilia, and using the later suras of the Koran to justify these in contradiction to the earlier suras.
QUR'AN [5.32]
For this reason did We prescribe to the children of Israel that whoever slays a soul, unless it be for manslaughter or for mischief in the land, it is as though he slew all men; and whoever keeps it alive, it is as though he kept alive all men; and certainly Our apostles came to them with clear arguments, but even after that many of them certainly act extravagantly in the land.
Note the "mischief" exception that is justification for killing.
Simply proselytizing any faith but Islam, is an excuse to kill:
QUR'AN [9.29] Fight those who do not believe in Allah, nor in the latter day, nor do they prohibit what Allah and His Apostle have prohibited, nor follow the religion of truth, out of those who have been given the Book, until they pay the tax in acknowledgment of superiority and they are in a state of subjection.
QUR'AN [9.30] And the Jews say: Uzair [Ezra] is the son of Allah; and the Christians say: The Messiah is the son of Allah; these are the words of their mouths; they imitate the saying of those who disbelieved before; may Allah destroy them; how they are turned away!