In this regard it will suffice for the reader to refer to...
In this regard it will suffice for the reader to refer to the valuable book called Al-Morayeat (pp.218-282) and another precious book called Al-Naswa Al-Ejtehad. The opposition of the Prophet's followers towards him had reached such a critical level that the Holy Quran, using a severe language, warned them against such cases of disobediences.
These events and verses all lead us to realize that not all of the Prophet's followers showed him the necessary obedience and discipline; rather, in most cases where divine orders were in contrast with their personal desires, they preferred to disobey the Prophet and tried in vain to force the Prophet to follow them blindly. It was the same group of people who, after the Prophet's demise, convened those so-called consuls and openly defied the Prophet.
The answer to the second Question It should be pointed out that Imam Ali (as) in different occasions, used the Event of Ghadir to prove his rights. Whenever he could, he used this event to suppress his opponents and to boost his position in the eye of people; in this way, he revealed the truth to the people.
Not only Imam Ali, but also Fatima (sa), her sons Hasan (as) and Husain (as) and a group of distinguished Islamic personalities, such as Abdullah Ibn Jaafar, Ammar Yasir, Asbaq Ibn Nabata Qais Ibn Saad, and even some of the Umayyad and Abbasid caliphs, such as Umar Ibn Abdol Aziz and Maamun, the Abbasid caliph, and above all dignitaries, such as Amr Waas Save reasoned over the Event of Ghadir.
Thus discussions over the Ghadir event have always been the issue since Imam Ali's time and it is being used to prove the issues of Imamate and Welayat.