The answer is not complicated brother, Allah (swt) has cursed those who have went against the Prophet (saww) in his (saww)'s words, and Allah (swt) has cursed those who lied and gave rule's other than that of Allah (swt)'s, Allah (swt) has also cursed those who angered Him (swt) and angered and hurt the Prophet (Saww)
[1] .. and we see Allah (swt) cursing in many areas
[2]
When we look at the first three caliph's, and what they have done, and then compare them with these verses, the answer will become very clear, and if you have open mind, you will accept them insha'Allah
1) Narrated Al-Miswar bin Makhrama:
Allah's Apostle said, "Fatima is a part of me, and he who makes her angry, makes me angry."
[3]
We then look at this narration :
Narrated 'Aisha:
(mother of the believers) After the death of Allah 's Apostle Fatima the daughter of Allah's Apostle asked Abu Bakr As-Siddiq to give her, her share of inheritance from what Allah's Apostle had left of the Fai (i.e. booty gained without fighting) which Allah had given him. Abu Bakr said to her, "Allah's Apostle said, 'Our property will not be inherited, whatever we (i.e. prophets) leave is Sadaqa (to be used for charity)."
Fatima, the daughter of Allah's Apostle got angry and stopped speaking to Abu Bakr, and
continued assuming that attitude
till she died. Fatima remained alive for six months after the death of Allah's Apostle.
[4]
Then we look at the verse:
[Yusufali 33:57] Those
who annoy Allah and His Messenger -
Allah has cursed them in this World and in the Hereafter, and has prepared for them a humiliating Punishment.
This is one proof, another proof is this :
Abd al-Rabmin b. Abza narrated It on the authority of his father that a man came to 'Umar and said: I am (at times) affected by seminal emission but find no water. He ('Umar) told him not to say prayer. 'Ammar then said. Do you remember,0 Commander of the Faithful, when I and you were in a military detachment and we had had a seminal emission and did not find water (for taking bath) and you did not say prayer, but as for myself I rolled in dust and said prayer, and (when it was mentioned before) the Apostle (may peace be upon him) said: It was enough for you to strike the ground with your hands and then blow (the dust) and then wipe your face and palms. Umar said: 'Ammar, fear Allah. He said: If you so like, I would not narrate it.
A hadith like this has been transmitted with the same chain of transmitters but for the words: 'Umar said: We hold you responsible for what you claim."
[5]
Then we look at the verse :
[Yusufali 2:159] Those who conceal the clear (Signs) We have sent down, and the Guidance, after We have made it clear for the people in the Book,-on them shall be Allah's curse, and the curse of those entitled to curse,-
It is quite clear from the narration that Umar concealed it, when he (umar) told Ammar

"fear Allah" and Ammar

replying "If you so like, I would not narrate it."
3) Umar and Abu Baker raising their voice over the Prophet (saww)'s voice:
Narrated Ibn Abi Mulaika:
Once the two righteous men, i.e., Abu Bakr and 'Umar were on the verge of destruction (and that was because): When the delegate of Bani Tamim came to the Prophet, one of them (either Abu Bakr or 'Umar) recommended Al-Aqra' bin Habis At-Tamimi Al-Hanzali, the brother of Bani Majashi (to be appointed as their chief), while the other recommended somebody else. Abu Bakr said to 'Umar, "You intended only to oppose me." 'Umar said, "I did not intend to oppose you!" Then their voices grew louder in front of the Prophet whereupon there was revealed: 'O you who believe! Do not raise your voices above the voice of the Prophet..a great reward.' (49.2-3) Ibn Az-Zubair said, 'Thence forward when 'Umar talked to the Prophet, he would talk like one who whispered a secret and would even fail to make the Prophet hear him, in which case the Prophet would ask him (to repeat his words)."
[6]
I believe this is sufficient proof to prove the point ..
Wa
--------------------
[1]ان الذين يؤذون الله ورسوله لعنهم الله في الدنيا والاخرة واعد لهم عذابا مهينا(33:57)--Lo! those who malign Allah and His messenger, Allah hath cursed them in the world and the Hereafter, and hath prepared for them the doom of the disdained
[2]2:88, 2:89, 2:159, 2:161, 3:61, 3:87, and many more..
[3]Sahih Bukhari, Volume 5, Book 57, Number 61:
http://www.usc.edu/dept/MSA/fundamentals/h...tml#005.057.111
[4]Sahih Bukhari, Volume 4, Book 53, Number 325:
http://www.usc.edu/dept/MSA/fundamentals/h...tml#004.053.325
[5]Sahih Muslim, Book 003, Number 0718:
http://www.usc.edu/dept/MSA/fundamentals/h...t.html#003.0718
[6]Sahih Bukhari, Volume 9, Book 92, Number 405:
http://www.usc.edu/dept/MSA/fundamentals/h...tml#009.092.405
Edited by Imami_ali, 12 March 2005 - 09:13 AM.