12 Caliphs & The Caliphate Will Last For 30 Years

We often see the Shia's use the hadith of the twelve caliphs in order to prove the imamate of the 12 Imams (as):

Narrated Jabir bin Samura: I heard Muhammad saying, "There will be twelve Muslim rulers." He then said a sentence which I did not hear. My father said, "All of them (those rulers) will be from Quraish.-Bukhari

It has been reported on the authority of Jabir b. Samura who said: I went with my father to the Messenger of Allah (may peeace be upon him) and I heard him say: This religion would continue to remain powerful and dominant until there have been twelve Caliphs. Then he added something which I couldn't catch on account of the noise of the people. I asked my father: What did he say? My father said: He has said that all of them will be from the Quraish.-Muslim

The Prophet said: "There will be after me twelve Amir (Prince/Ruler), all of them from Quraysh."-Tirmidhi

The Prophet (PBUH&HF) said: "The affairs of people will continue to be conducted (well) as long as they are governed by the twelve men."-Muslim

“Verily this matter [of rule] shall [remain] in Quraysh so long as when they are asked for mercy, they show mercy, when they rule, they are just, and when they distribute, they are equitable, so whoever from them does not do this, then upon him is the curse of Allah, the angels and all of humankind, and compulsory acts and voluntary acts will not be accepted from him.” (Ahmad, al-Bazzar and al-Tabrani narrated and the narrators of Ahmad are trustworthy as [mentioned] in Majma’ al-Zawa’id (5:193))

It has been narrated on the authority of Jabir b. 'Abdullah that the Messenger of Allah (may peace be upon him) said: People are the followers of Quraish in good as well as evil (i. e. in the customs of Islamic as well as pre-Islamic times).

Firstly, the hadiths are talking about caliphs/amirs, which equates to rulers over the Muslim world. None of the twelve Imams (as) but Imam Ali (as) and Imam Hassan (as) were actual rulers. So already, we can  deduce that this hadith is not talking about the 12 Imams of the Shias. Secondly, the hadith does not state that these rulers will be infallible, divinely appointed, will come successively, or from the Ahl Al Bayt (as). All it states is that they will be from the tribe of Quraish and that Islam will be dominant and powerful during their rule. Was Islam strong during the time of the Imams? Is Islam strong right now in the absence of the 12th Imam? Moreover, if this is the hadith that the Shia's are trying to deduce their concept of imamate from, how come the Prophet (pbuh) never hinted about this hadith at the event of Ghadeer? How come he (pbuh) didn't say that Ali (as) was the first of the twelve if the hadith is talking about them? Furthermore, there are more than 12 Imams from the Ahl Al Bayt (as), and I do not see why the Shia only limit it to twelve. There were many great Imams from the Ahl Al Bayt (as) such as Imam Zayd (as), Imam Muhammad al-Nafs al-Zakiyya (as), Imam Ismael bin Jaffar (as), and Imam Esa bin Zayd (as) only to name a few. Lastly, if this hadith is referring to the 12 Imams (as), how come the Prophet (pbuh) never named them? It would be only fitting to tell the ummah, especially at Ghadeer or the Farewell Sermon on who their rulers would be in order to avoid confusion. If this is a matter of usul/foundations of deen which is supposedly HIGHER than Prophethood (which the shia's claim), the Prophet (pbuh) would have named all the Imams in explicit and great detail. Yet, we see in the history of the Shia, after the death of each Imam, a number of  sects and sub sects arose just over the confusion on who the next Imam would be. Lastly, how come Imam Ali (as) or any of the other Imams (as) never used this hadith to justify their right to the caliphate? 

Nonetheless, Alhamdulillah, we have hadiths where the Prophet (pbuh) himself PROPHESIED the caliphate of the Khulafa al-Rashidun (ra):

"The Prophetic khilaafah will last for thirty years. Then Allaah will give the dominion to whomever He wills."-Saheeh al-Jaami' as-Sagheer, reported by Abu Dawud and Al-Haakim; declared "Sahih" by Imam al-Albaani (ra)

"The khilaafah after me in my Ummah will last for thirty years. Then there will be kingship after that."Reported in the Musnad Imaam Ahmad, by at-Tirmidhi, Musnad Abi Ya'laa, and Ibn Hibbaan;  "Saheeh"by Imaam al-Albaani (ra)

"The Prophethood will remain amongst you for as long as Allaah wills it to be. Then Allaah will raise it when He wills to raise it. Then there will be the khilaafah upon the Prophetic methodology. And it will last for as long as Allaah wills it to last. Then Allaah will raise it when He wills to raise it. Then there will be biting kingship, and it will remain for as long as Allaah wills it to remain. Then Allaah will raise it when He wills to raise it. Then there will be tyrannical (forceful) kingship and it will remain for as long as Allaah wills it to remain. Then He will raise it when He wills to raise it. Then there will be a khilaafah upon the Prophetic methodology."-Silsilah as-Saheehah of Imaam al-Albani; "Sahih"

"Al-Nauman ibn Basheer told us: The Prophet PBUH said: ‘Prophethood will remain in you for as long as God decides for it to remain and then God will remove it when He decides to remove it. After Prophet hood, there will be a Caliphate on the style of prophethood and it will exist for as long as God decides for it to exist, then He will remove it when He decides to remove it. Then there will be a kingdom in which people will face trials and tribulations and it will continue to exist for as long as God decides for it to exist. Then He will remove it, when He decides to remove it. After this, there will be an oppressive kingdom and it will continue to exist for as long as God decides for it to exist. Then He will remove it, when He decides to remove it. Then there will once again be a rule on the style of prophet hood. After saying this, the Prophet (pbuh) was silent."Takhreej Mishat al Masabih #5306; Sahih

Hudhayfah son of Al-Yaman reported that the Messenger of Allah sallalluhu 'alayhi wa sallam said, "Prophethood (meaning himself) will remain with you for as long as Allah wills it to remain, then Allah will raise it up whenever he wills to raise it up. Afterwards, there will be a Caliphate that follows the guidance of Prophethood remaining with you for as long as Allah wills it to remain. Then, he will raise it up whenever He wills to raise it up. Afterwards, there will be a reign of oppressive (The reign of Muslim kings who are partially unjust) rule and it will remain with you for as long as Allah wills it to remain. Then, there will be a reign of tyrannical rule and it will remain for as long as Allah wills it to remain. Then, Allah will raise it up whenever He wills to raise it up. Then, there will be a Caliphate that follows the guidance of Prophethood." Then Hudhayfah said, "The Prophet stopped speaking."-As-Sililah As Sahihah

If we have a look at the caliphate of Abu Bakr (ra), Umar (ra), Uthman (ra), Ali (as), and if you add Imam Hassan's (as) rule of 6 months, you will clearly see that it becomes 30 years. These narrations show that there is no such thing as 12 divinely appointed Imams (as) after the Prophet (pbuh) ruling over the ummah. If there were, the Prophet (S.A.W.) would have mentioned them.