Quran Misinterpreted ?

This account ,though doesn't refer to Muslims directly, yet it might be accounted as a warning!

2:74        Then your hearts hardened after that, so that they were like rocks, rather worse in hardness; and surely there are some rocks from which streams burst forth, and surely there are some of them which split asunder so water issues out of them, and surely there are some of them which fall down for fear of Allah, and Allah is not at all heedless of what you do.

2:75        Do you then hope that they would believe in you, and a party from among them indeed used to hear the Word of Allah, then altered it after they had understood it, and they know (this).

2:76        And when they meet those who believe they say: We believe, and when they are alone one with another they say: Do you talk to them of what Allah has disclosed to you that they may contend with you by this before your Lord? Do you not then understand?

2:77        Do they not know that Allah knows what they keep secret and what they make known?

2:78        And there arc among them illiterates who know not the Book but only lies, and they do but conjecture.

2:79        Woe, then, to those who write the book with their hands and then say: This is from Allah, so that they may take for it a small price; therefore woe to them for what their hands have written and woe to them for what they earn.

Quran warns Muslims too!

3:7 He it is Who has revealed the Book to you; some of its verses are decisive, they are the basis of the Book, and others are allegorical; then as for those in whose hearts there is perversity they follow the part of it which is allegorical, seeking to mislead and seeking to give it (their own) interpretation. but none knows its interpretation except Allah, and those who are firmly rooted in knowledge say: We believe in it, it is all from our Lord; and none do mind except those having understanding. 

41:40 Lo! those who distort Our revelations are not hid from Us. Is he who is hurled into the Fire better, or he who cometh secure on the Day of Resurrection? Do what ye will. Lo! He is Seer of what ye do.