1. Harun عليه السلام was given the mantle of custodian and caretaker of the Bani Israel until the eventual return of Musa عليه السلام from the Mount Toor. And it was in this capacity that the Messenger of Allah صلى الله عليه و سلم referred to Hadhrat Ali as akin to Harun عليه السلام, for he too was charged with the responsibility of looking after those left behind until the Messenger of Allah صلى الله عليه و سلم returned from his expedition to Tabuk. Furthermore, Harun عليه السلام never assumed the absolute authority of successor to rule in the absence of Musa عليه السلام, and was in fact that is why he didn’t intervene when the Bani Isra’il started their worship of the golden calf –
(Moses) said: “O Aaron! what kept thee back, when thou sawest them going wrong? From following me? Didst thou then disobey my order? (Aaron) replied: “O son of my mother! Seize (me) not by my beard nor by (the hair of) my head! Truly I feared lest thou shouldst say, ‘Thou has caused a division among the children of Israel, and thou didst not respect my word!'” (20:92-94)
2. Shiites also fail to take into consideration that Hadhrat Ali was made the caretaker of the Ummah not only in the absence of the Messenger of Allah صلى الله عليه و سلم, but also in the absence of Hadhrat Abu Bakr and Hadhrat Umar رضي الله عنهم. This shows that the narration in question has no relevance to the Shiite claim of the caliphate rightfully belonging to Hadhrat Ali رضي الله عنه over Siddiqe-Akbar.
3. If the appointment of one as leader of the people by the Messenger of Allah was sufficient enough proof for the position of Caliphate, then why do Shiites ignore that Hadhrat Abu Bakr Siddiq رضي الله عنه was nominated as Ameer-ul-Hajj by the Messenger of Allah ? And even when Hadhrat Ali رضي الله عنه was sent as a minister to make the formal announcement in Makkah and was asked by Siddiqe-Akbar “امبرٌ ام مأمور ” (Are you sent as Amir or Ma’mur/follower) to which Hadhrat Hadhrat Ali رضي الله عنه replied “بل مأمور” (Indeed, as a follower). What answer do Shiites have to the fact that at the time of Hijrah, the Messenger of Allah appointed Hadhrat Ali رضي الله عنه to stay in his place to return the possessions of the people of Makkah, but it was Hadhrat Abu Bakr رضي الله عنه who Allah decreed to accompany the Prophet صلى الله عليه و سلم. Why has no Shiite ever been able to explain why did the Messenger of Allah صلى الله عليه و سلم appointed Hadhrat Abu Bakr رضي الله عنه as the Imam to lead the prayers on his musalla and not Hadhrat Ali?
4. If you are using verses from the Qur’an to state the similarities between Hadhrat Ali رضي الله عنه and Harun عليه السلام in spite of clear differences between the two. First of all, Harun عليه السلام died during the lifetime of Musa عليه السلام so he was never a successor. Secondly, on one hand you say Hadhrat Ali رضي الله عنه did not fight for his right for the Caliphate because of fear that it would create a division within the Ummah, but you on the other hand are doing the exact opposite. Interestingly enough, you are also making the veiled implication that (معاذ الله) Hadhrat Ali رضي الله عنه was too weak or too timid to fight for what he believed was his Divine Right that you are doing it for him now in spite of his reputation for fearlessness and being called ‘Haidere-Karraar’.