I've recently seen a lot of hostility to the idea of Tobi being Obito due to plot-holes/errors. I will thus give my own insight on why it could remain consistent with the story.
How Obito could have survived being crushed:
I believe Obito survived this is due to his awakening of the Mangekyo Sharingan from the trauma of the event, which would have been right after sacrificing his left eye to Kakashi. Thus being able to activate Kamui to escape.
I doubt that Obito was actually rescued from the rubble, as who would really be keeping an eye on Obito to begin with as he was a seemingly normal uchiha with no apparent special abilities. It's more likely he was "rescued" after being able to escape.
Based on this, I believe it's very likely he was taken in by either:
Madara - Madara Uchiha himself lived a long life, as he knew of Nagato, so he may have took Obito on as his protégée.
Orochimaru - As it can be interpreted in chapter 489 that Kabuto knew who Tobi was, and Orochimaru loves to experiment, but he can't bring people back from the dead (with the exception of edo-tensei, but Obito doesn't really have such features of an edo-tensei zombie).
From here on, Obito was very likely experimented on while being treated for his injuries, hence why he is part senju (Izanagi).
My theory for Obito actually wanting to complete 'Infinite Tsukuyomi' is to bring back Rin, chapter 599 heavily fixates on Obito's relationship with Rin, and I don't think it's a far stretch based off 'Kakashi Gaiden' to say that Obito was in love with her.
I think Obito himself would have been heavily manipulated into this plan.
His hostility to Konohagakure (and perhaps the Uchiha Clan itself) may be due to a link with the Third Shinobi World War. It's not known when Rin died, but if it was during the war, and if Konohagakure/Uchiha was partially responsible for the war itself or whatever situation Rin may have been in, it may very well explain his hate.
Just a note to those criticising Kishimoto, this was very likely planned from the beginning or from at least the Kakashi Gaiden segment. Kishimoto is rather infamous for extremely long plot-devices, as seen with Naruto coughing out the crow 200 or so chapters after Itachi originally gave it to him. There's very likely valid reasoning behind all of this.
How Obito could have survived being crushed:
I believe Obito survived this is due to his awakening of the Mangekyo Sharingan from the trauma of the event, which would have been right after sacrificing his left eye to Kakashi. Thus being able to activate Kamui to escape.
I doubt that Obito was actually rescued from the rubble, as who would really be keeping an eye on Obito to begin with as he was a seemingly normal uchiha with no apparent special abilities. It's more likely he was "rescued" after being able to escape.
Based on this, I believe it's very likely he was taken in by either:
Madara - Madara Uchiha himself lived a long life, as he knew of Nagato, so he may have took Obito on as his protégée.
Orochimaru - As it can be interpreted in chapter 489 that Kabuto knew who Tobi was, and Orochimaru loves to experiment, but he can't bring people back from the dead (with the exception of edo-tensei, but Obito doesn't really have such features of an edo-tensei zombie).
From here on, Obito was very likely experimented on while being treated for his injuries, hence why he is part senju (Izanagi).
My theory for Obito actually wanting to complete 'Infinite Tsukuyomi' is to bring back Rin, chapter 599 heavily fixates on Obito's relationship with Rin, and I don't think it's a far stretch based off 'Kakashi Gaiden' to say that Obito was in love with her.
I think Obito himself would have been heavily manipulated into this plan.
His hostility to Konohagakure (and perhaps the Uchiha Clan itself) may be due to a link with the Third Shinobi World War. It's not known when Rin died, but if it was during the war, and if Konohagakure/Uchiha was partially responsible for the war itself or whatever situation Rin may have been in, it may very well explain his hate.
Just a note to those criticising Kishimoto, this was very likely planned from the beginning or from at least the Kakashi Gaiden segment. Kishimoto is rather infamous for extremely long plot-devices, as seen with Naruto coughing out the crow 200 or so chapters after Itachi originally gave it to him. There's very likely valid reasoning behind all of this.
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