are these verses are true? does the punishment fit the crime?
http://cwis.usc.edu/dept/MSA/fundamentals/hadithsunnah/abudawud/038.sat.html
brother i think that a few of them are true however you must check your sources and whether these hadiths are weak.
here are some alternate verses from the Quran:
"Whosoever kills a human being (without any reason like) man-slaughter, or corruption on earth, it is thought he had killed all mankind." (5:32)
The propriety of taking life in retaliation for murder or for spreading corruption can be decided only by a proper court of law. During a war only a properly established government can decide it. In any event, the Qur’an makes clear: "Do not kill a soul which Allah has made sacred except through the due process of law." (6:151)
The Prophet, blessings of Allah and peace be upon him, has declared homicide as the greatest sin after polytheism. He says,"The greatest sins are to associate something with Allah and to kill human beings."
All promiscuous relationships are forbidden to him. The words of the Holy Qur’an, in this respect, are: "Do not approach (the bounds) of adultery" (17:32).
Heavy punishment has been prescribed for this crime, and no mitigating circumstances are indicated. Since the violation of the chastity of a woman is forbidden in Islam, a Muslim who perpetrates this crime cannot escape punishment-whether he receives it in this world or in the Hereafter.