The word "corruption of the land" (fasad) means
any act whatsoever that goes against the proper reading and application of the word of Allah in Quran. Thus it can mean unlawful killing and other acts prescribed by the Quran as well as to false beliefs, skepticism about the word, attempts to reinterpret the doctrine etc. All your quotes in the link are completely in synchrony with such a meaning of corruption.
Further, because of its wide application, the word's meaning in a particular instance has to be read from the context of the sentence (and commentaries when necessary).
So for example here:- (Cow chapter)
8 Some people say, ‘We believe in God and the Last Day,’ when
really they do not believe. 9 They seek to deceive God and the
believers but they only deceive themselves, though they do not realize
it. 10 There is a disease in their hearts, to which God has added
more: agonizing torment awaits them for their persistent lying.
11 When it is said to them, ‘Do not cause corruption in the land,’ they
say, ‘We are only putting things right,’ 12but really they are causing
corruption, though they do not realize it. 13 When it is said to them,
‘Believe, as the others believe,’ they say, ‘Should we believe as the
fools do?’ but they are the fools, though they do not know it. 14When
they meet the believers, they say, ‘We believe,’ but when they are
alone with their evil ones, they say, ‘We’re really with you; we were
only mocking.’ 15 God is mocking them, and allowing them more
slack to wander blindly in their insolence. 16 They have bought error
in exchange for guidance, so their trade reaps no profit, and they are
not rightly guided.
A reading of the verses show that
a very plausible interpretation is that here the term "corruption of the land" refers to actions of people who through self-deception and for reverence to authorities other than God (the evil ones)
seek to change how the faith is believed by most pious Muslims, calling their ways foolish and seeking to "improve" them and hence causing corruption of the land.
Hence this verse can be so easily be used to indict all attempts to reform Islam.
Now the way is clear for every sect of Islam to call other groups
the real corrupters and hence as you yourself have so helpfully pointed out Quran says:-
5:32 On account of [his deed], We decreed to the Children
of Israel that if anyone kills a person–
unless in retribution for
murder or spreading corruption in the land– it is as if he kills all
mankind, while if any saves a life it is as if he saves the lives of all
mankind.
Thus giving sects of Islam divine justification to kill each other by accusing other sects for corruption of the land.
See the problem? It is the Quran itself that is legitimizing the sectarian strife within Islam.
And when you are saying that a very traditional Hadith believed by a billion Muslims and for over a thousand years, is mistaken, are you not ceasing to believe as others do and hence you can not in turn be accused of being a corrupter of the land? And then does not the Quran provide legal justification for a conservative Islamic country or an Islamic lawgiver to call for your death?
And finally Islam means submission, not peace.
"Islam" Means "Submission," Not "Peace" — Explanation of a Subtle Connection
