Obito's hate for the Uchiha was simply a result of Madara's animosity towards the clan, as they had betrayed him long ago and had decided to side with the Senju-led government.
Itachi wasn't strong, he was super smart. Obito feared his smartness. He knew Itachi would destroy any plan of obito as long as he's alive. Obito was not afraid of dying, he was just afraid of his plan getting ruined.
Out of fear of going on a rampage, she jumped in front of Kakashi's Chidori, which killed her. Witnessing the death of the one he loved so much turned Obito into a villain who is primarily responsible for the Fourth Great Ninja War. However, Rin's death was merely a trigger, after which Obito snapped and turned evil.
In the anime, Tobi slaughtered the military portion of the Uchiha Clan by directly attacking the Konoha Military Police Force headquarters, enabling Itachi to slaughter the civilian portion without much resistance, and Tobi also secretly took some of the Uchiha's corpses for himself.
Obito Uchiha, also known by his iconic alias, Tobi, as well as the Masked Man, is one of the main antagonists of the Naruto franchise. He is the true leader of Akatsuki and serves as a dark reflection of the titular hero Naruto Uzumaki.
Orochimaru. The Legendary Sannin was the main villain of Naruto for the bulk of the storyline. Orochimaru was a snake-like creature that desired more than anything to destroy his hometown, the Leaf Village.
Because he knew the truth that Kakashi didn't kill Rin rather Rin killed herself throwing herself onto Kakashi's Chidori. And he hated Kakashi because Kakashi failed to protect Rin, that's it. Why didn't Obito confront Kakashi after he witnessed him kill Rin?
His nickname (Tobi) comes from Obito calling him Guruguru (グルグル), an onomatopoeia for turning round and round or going around in circles. It can also mean "wrapped around", referring to Tobi's function as armor for Obito.
Obito wore a variety of different masks over the years to hide his identity when he interacted with others.
As Obito had presented himself as Madara, and implied that he also bore hatred for the Uchiha, Itachi requested him to help wipe out the clan. However, Itachi also had a condition; Obito must spare Sasuke and the Leaf Village, to which he obliged.
One common theory that fans came up with was that his change in behavior was due to split personality disorder. In the Naruto series, Tobi could have been the manifestation of the fun and goofy side of Obito, which he didn't really get to showcase in the series. He has always been a serious person with big dreams.
Why does Tobi pretend to be dumb? Tobi was the one pulling the strings behind everything so he had to mask his true identity and seem unworthy of investigation. Tobi made himself look weak and useless, which is perfect for his disguise.
Obito was afraid of Itachi. But it's not that Itachi was stronger than Obito. Up until Itachi was alive, Obito had Hashirama Cells, Kamui, Izanagi and some other common jutsus which were enough to defeat Itachi, if used wisely. Itachi has no counter for Kamui.
Itachi was not scared of Jiraiya, he just understood the level of difficulty he faced in that matchup. In Naruto battles were not always about who's-stronger-than-who, but rather who has the better matchup due to their skillset.
Ultimately, the battle is a stalemate and a true testament to Obito's strength. Kakashi is one of the strongest characters by the end of the manga and the show, but Obito is definitely his equal.
Shortly after this injury, Kakashi's teammate Obito Uchiha was trapped under a boulder with no real chance of survival. While half of his body was crushed, he gifted his left eye to Kakashi to celebrate him making the rank of Jonin.
When Obito first comes into contact with Madara, he refers to him as his precious forefather. Having Obito say that could mean that he is a direct descendant of the legendary ninja. It does explain the reasoning behind taking up Madara's namesake as his own after becoming leader of the Akatsuki.
Tobi's true identity is: Obito Uchiha. He pretends to be Madara because he does not want to reveal his true identity because he should already be dead. that he can pretend to be someone else (Tobi), but once everyone calls him Madara, he changes his attitude to serious.
Surprisingly, he wasn't given the opportunity as he ended up dying at the hands of Kaguya Otsutsuki towards the end of the Ninja War.
Tobi was originally one of the various humans transformed into a White Zetsu after Kaguya had originally released her Infinite Tsukuyomi.
In truth, Obito was saved from death and trained by Madara Uchiha, but the events of the war left Obito disillusioned with reality, and he inherited Madara's plan to create an ideal world.
Madara placed a curse mark in Obito, which prevented him from becoming the Ten Tails Jinchuriki and couldn't remove it himself so he let Kakashi stab him to remove it for him.
1. Obito never intended to bring back Rin, he only wanted to live on with the sweet memories he had with her. That is the reason he went for Infinite Tsukiyomi where his own dream , a Rin created in his imagination would be reunited with him.
Since Obito was injected with tons of Hashirama cells when Madara saved him, they gave him Wood Style, and a Mangekyou Sharingan that never went to blindness.
Rin developed a crush on Kakashi while they were in training together due to the fact that Kakashi was a genius, skipping ahead of his classmates.