He reviled Islam a great deal, and every time he wanted to repent the Shaytaan whispered to him that he was excused because he wasangry

I reviled Islam on many occasions, Allah forbid, but when I repent he saysto me: you were angry and you did not do that deliberately. Then I doubt myself: was I angry or not? was it deliberate or not? What should I do?.
Praise be to Allaah.
Reviling Islam is kufr and apostasy from Islam, according to scholarly consensus. The one who does that has to repent toAllah sincerely, by regretting what he has done and resolving not togo back to it. If he repents, Allah will accept his repentance. Allah, mayHe be exalted, says (interpretation of the meaning):
“Say: O ‘Ibaadi (My slaves) who have transgressed against themselves (by committing evil deeds and sins)! Despair not of the Mercy of Allaah, verily,Allaah forgives all sins. Truly, He is Oft‑Forgiving, Most Merciful”
[al-Zumar 39:53].
It was narrated from Abu Moosa (may Allah be pleased with him) that the Prophet (blessings and peace of Allah be upon him) said: “Allaah holds out His hand at night to accept the repentance of those who have sinned during the day, and He holds out his hand by day to accept therepentance of those who have sinned at night – until the sun rises from itsplace of setting.”
Narrated by Muslim, 2759
You have to repent and do a lot of righteous deeds. With regard to thinking about whether this was done in a state ofanger or not, this comes under the heading of waswasah (whispers fromthe Shaytaan), who wantsto divert you from repentance or weaken your fear of Allah and your efforts to do righteous deeds. If you understand the abhorrentnature and seriousness of what you did, that impels you to strive to do good and to instil in your heart humility before Allah; it makes you pin your hopeson His grace, kindness andpardon. But if your nafs makes falsehood attractive to you and detracts from the seriousness of the crime by claiming that it happened in a moment ofanger, then this will weaken you resolve and distract you from turning to Allah.
It should be noted that anger is not an excuse in all cases; rather the anger that may excuse a person is anger in which he loses his ability of discernment to the extent that he doesnot know what he is saying. If this happened once, it does not happen repeatedly. Many of those who have the problem of reviling Islam could never revile their fathers or someone they hold in high esteem or the father of an opponent in an argument and the like, nomatter how angry they become, but they do revile the religion becausetheir hearts are devoid of faith and they are lacking in respect towards Allah, His Messenger and His religion. We ask Allah to keep us safe and sound. If there was any faith in his heart it would prevent him from reviling religion.
So ignore this waswaas (whisper). You have committed a grave sin, but you have a Lord Who is Most Merciful, Most Generous, Who accepts repentance of the one who repents, forgives sins, and replaces evil deeds with good deeds. So prepare to strive hard, fill your heart with veneration and respect towards Allah, may He be exalted, and His religion, read a lot of Qur’aan and do a lot of righteous deeds.
We ask Allah to accept your repentance and forgive your sin.
And Allah knows best./ - - - :-> Transtors: 1.http://free-translation.imtranslator.net/lowres.asp 2.http://translate.google.com/m?twu=1&hl=en&vi=m&sl=auto&tl=en