Alzulfiqar!
Islam does not teaches blind following of anybody. We must follow Qur'aan and Sunnah (صلی اللہ علیہ وآلہ وسلم) to be successful in Aakhirat (آخرت). Furthermore, it is not required as Muslim to debate that whether Abu Talib were died as Muslim or not.
May Allah give hidayat to all of us (Aameen).
Narrated Al-Musaiyab: When Abu Talib was in his death bed, the Prophet went to him while Abu Jahl was sitting beside him. The Prophet said, "O my uncle! Say: None has the right to be worshipped except Allah, an expression I will defend your case with, before Allah." Abu Jahl and 'Abdullah bin Umaya said, "O Abu Talib! Will you leave the religion of 'Abdul MutTalib?" So they kept on saying this to him so that the last statement he said to them (before he died) was: "I am on the religion of 'Abdul MutTalib." Then the Prophet said, " I will keep on asking for Allah's Forgiveness for you unless I am forbidden to do so." Then the following Verse was revealed:--"It is not fitting for the Prophet and the believers to ask Allah's Forgiveness for the pagans, even if they were their near relatives, after it has become clear to them that they are the dwellers of the (hell) Fire." (9.113)
The other Verse was also revealed:-- "
(O Prophet!) Verily, you guide not whom you like, but Allah guides whom He will ......." (28.56)
(Sahih Bukhari; Book #58, Hadith #223)
Narrated 'Abdullah bin Al-Harith bin Naufal: Abbas bin 'Abdul Muttalib said, "O Allah's Apostle! Did you benefit Abu Talib with anything as he used to protect and take care of you, and used to become angry for you?" the Prophet said, "Yes, he is in a shallow place of Fire. But for me he would have been in the lowest part of the Fire." (
Sahih Bukhari; Book #73, Hadith #227)
Narrated Abu Said Al-Khudri: I heard Allah's Apostles when his uncle, Abu Talib had been mentioned in his presence, saying, "May be my intercession will help him (Abu Talib) on the Day of Resurrection so that he may be put in a shallow place in the Fire, with Fire reaching his ankles and causing his brain to boil." (
Sahih Bukhari; Book
#76, Hadith
#569)
It is reported on the authority of anas b. Malik that he said: We were forbidden that we should ask anything (without the genuine need) from the Holy Prophet. It, therefore, pleased us that an intelligent person from the dwellers of the desert should come and asked him (the Holy Prophet) and we should listen to it. A man from the dwellers of the desert came (to the Holy Prophet) and said: Muhammad, your messenger came to us and told us your assertion that verily Allah had sent you (as a prophet). He (the Holy Prophet) remarked: He told the truth. He (the bedouin) said: Who created the heaven? He (the Holy Prophet) replied: Allah. He (the bedouin again) said: Who created the earth? He (the Holy Prophet) replied: Allah. He (the bedouin again) said: Who raised these mountains and who created in them whatever is created there? He (the Holy Prophet) replied: Allah. Upon this he (the bedouin) remarked: By Him Who created the heaven and created the earth and raised mountains thereupon, has Allah (in fact) sent you? He (the Holy Prophet) said: Yes. He (the bedouin) said: Your messenger also told us that five prayers (had been made) obligatory for us during the day and the night. He (the Holy Prophet) remarked: He told you the truth. He (the bedouin) said: By Him Who sent you, is it Allah Who ordered you about this (i. e. prayers)? He (the Holy Prophet) said: Yes. He (the bedouin) said: Your messenger told us that Zakat had been made obligatory in our riches. He (the Holy Prophet) said. He has told the truth. He (the bedouin) said: By Him Who sent you (as a prophet), is it Allah Who ordered you about it (Zakat)? He (the Holy Prophet) said: Yes. He (the bedouin) said: Your messenger told us that it had been made obligatory for us to fast every year during the month of ramadan. He (the Holy Prophet) said: He has told the truth. He (the bedouin) said: By Him Who sent you (as a prophet), is it Allah Who ordered you about it (the fasts of ramadan)? He (the Holy Prophet) said: Yes. He (the bedouin) said: Your messenger also told us that pilgrimage (Hajj) to the House (of Ka'bah) had been made obligatory for him who is able to undertake the journey to it. He (the Holy Prophet) said: Yes. The narrator said that he (the bedouin) set off (at the conclusion of this answer, but at the time of his departure) remarked: 'By Him Who sent you with the Truth, I would neither make any addition to them nor would I diminish anything out of them. Upon this the Holy Prophet remarked: If he were true (to what he said) he must enter Paradise. (Sahih Muslim Book #001, Hadith #0009)