Let's suppose that Abu Talib was unbeliever -although it was...
Let's suppose that Abu Talib was unbeliever -although it was not so and would never be accepted by the rightness and the fair conscience- and didn't support the Prophet (s) at all but the Prophet (s) would intercede for him to be in Paradise.
This intercession wouldn't surprise the two groups of mankind and jinn because the Prophet ____________ 1 Sharh Nahjol Balagha, vol.3 p.314, Biharul Anwar, vol.6 p.445, 523, 529, Sheikhul Abtah p.43, al-Ghadeer, vol.7 p.374, 387, Al-Hujja p.67, Abu Talib p.89, Mo'jamul Quboor, vol.1 p.191, 204, Tafseer Ali bin Ibraheem p.355, Tathkiratul Khawass p.10, Eeman Abu Talib p.10, A'yan ash-Shia, vol.39 p.139, 161.
2 Sharh Nahjol Balagha, vol.3 p.314, Biharul Anwar, vol.6 p.445, 523, 529, Sheikhul Abtah p.43, al-Ghadeer, vol.7 p.374, 387, Al-Hujja p.67, Mo'jamul Quboor, vol.1 p.204, Eeman Abu Talib p.10, A'yan ash-Shia, vol.39 p.161. (s) would never intercede for an unbeliever. But if Abu Talib would be rewarded with entering Paradise for his virtues and good deeds, hence the intercession of the Prophet (s) would be further than entering Paradise and this world surprise man and the jinn.
The Prophet (s), besides being loyal to his uncle's favors, wanted by saying this to refute those who wrongly thought that Abu Talib hadn't believed in the mission just because that he sometimes concealed his faith when the circumstances were not suitable for him to announce his faith openly in order to be able to carry out his tasks in the interest of the mission without obstacles. Then the Prophet (s) added to his word this lament: "Ah father! Ah Abu Talib! O uncle, how bitter my sorrow is!
How can I forget you! You brought me up when I was a child, responded to me when I was and I was for you as the pupil for the eye and as the soul for the body." This was another evidence by the Prophet (s) proving the faith of Abu Talib when saying: "... responded to me when I was a man ..." Let's ponder about this delicate expression of the Prophet (s): he said that his position in his uncle's heart was like the eye and the soul.
What an accurate imaging showing how much Abu Talib had loved the Prophet (s) and what a great position he had in his uncle's heart. Would such a man, who had all that love and that respect to the Prophet (s), not believe in the Prophet's mission? Certainly not! It would be beyond impossibility!