The Ali and Abu Bakr controversy on it's own would not have led to a theological difference where they become a different sect. Back then, it was a difference of opinion. The real controversies began after Usman, the third caliph was assassinated.
The khwarijites were responsible, but it led to conflicts and accusations on both sides and this later led to the assassination of Ali, again by khwarijite. You had Ummayad rule and then Abbasid rule. During that time, hadiths were compiled by the abbasid's that in various ways served their political interests...so even the hadith of the Mahdi with the carriers of the black flag from Khorosan was constructed as a part mix of persian/zoroastrian prophecies and of course we know the Abbasids ruled from Persia, had the black flags etc. Just like the hadith of Aisha's age were an abbasid attempt to present her as a noble child virgin and therefore answer the shia attacks against her.
The theological differences come about because the sunni's had their own imams and the shia's had their own.
Also, it's important to know that shia/sunni have existed for a long time together in peace and it's only in recent times it's turned to widespread bloodshed. Also, most shias today, the way they curse at Abu Bakr, Umar and Aisha to me suggests they have no faith whatsoever. I've never seen a sunni ever curse at any of the sahaba in that way.
Also what we see today, is barely even islam anymore.
@Haich the slight differences in the way we place our hands during salat, is a matter of opinion and ive never seen any credible sunni attack the way they pray salat. also the stone they place on the mat is not about shirk incase you think it is that.
https://en.wikipedia.org/wiki/Turbah
However, the major problem I have with the shia's is that their belief is basically to literally suck dick of anyone who is a bloodline syed. They may aswell convert to judaism in that case because islam is not a religion that preaches supremacy of one bloodline.
unfortunately the worst creatures in the muslim world are the same people who descend from Mohammad SAW through Fatima and Ali...
I have spent a lot of years observing shit...
it's funny, i believe in islam on it's own merits and in the prophet SAW because I know he rejected the idea of bloodline supremacy..he even said in one hadith
".....Then will come a test which is pleasant. Its murkiness is due to the fact that it is produced by a man from the people of my house, who will assert that he belongs to me, whereas he does not, for my friends are only the God-fearing."
Also i need to add, salafis/wahabis are classed as sunnis but they are a different breed to the mainstream majority of sunnis who adhere to sufi beliefs. Even the deobandis who are more right wing and salafi-esque in many ways..believe in the sufi tariqas.
The sufi's also....
suck the dick of THE bloodline...and that's probably why i cannot be bothered following any sufi.
if you look at the sunni/sufi types today like Sheikh Yaqoobi, Sheikh Ninowy, Tahir ul Qadri and thousands of more, they are effectively running a scam where they externally present the love for prophet SAW but it is in effect about making you love THE bloodline and thus, suck their dicks for all eternity.
I've gotten into a lot of trouble before for disrespecting these fellas...but i firmly believe what i say is true. I've spent hours and hours listening to their lectures and i've met them all in person, (they travel about $$$££££s).
Back when i felt very strongly about all of this..i was vindicated by the fact Jesus AS himself very specifically called out the pharisees, their bloodline superiority ideas. He was basically saying everything i wanted to say to the absolute bloodline cockfest the sufi/shia circles have turned into.
btw my colourful language is 1000% appropriate. these people do a lot of evil to their followers. when females are raped by one of them, they don't exactly make it an open topic because you know, honour matters. I'm kind of in the know because i walked those circles and knew so many stories which i'd discuss with my imam in private. I used to appeal to this guys sanity and tell him to quit those circles but he did not listen, whenhe discovered too much info after i'd completely cut ties with him, he got excommunicated by the bloodline. it's kind of like capitalism vs communism, where both sides are controlled by one bloodline and the only people who seem to be against them all happen to be facist
sunni-sufi, shia..and wahabi.