Why did Obito become a villain?
Obito never became a villain.
He was kind hearted Teenager who died while saving Kakashi
and Theories of Obito=Madara are rumours
Ehmm corection, now that is proved that Tobi is Obito(even it
sounds crazy that 13 years summon Nine tails and do what Tobi did),
Tobi or Obito was in love(had crush) on Rin Noharu,his team mate.
He sacrified his life tosave her and wasw crush by a huge
rock...Obito was found and healed by non other than Madara Uchiha,
who somehow survived his clash with Harsihrama.Obito had Sahringan,
so his and Kakashi's Sahringan are conected...One of Madara's white
Zetsu clone siad that Kakashi and Rin are in danger.Obito even hur,
fuond way to go, and help his friends, but he saw that Kakashi in
heat of fighting with Kiri ANBU has killed poor Rin with his
Chidory...To be worse,Minato Namikaze was this time also absentlike
the time Obito ,,died''...Obito killed Kiri nins, and while Kakashi
was knocked out he came to Rins dead body, took her, and swore to
create world in which she will be alive...He than came back to
Madara, ant helped him in his plan...So lets look at othe aspects,
first, Obito sacrificed himself to save Rin and Kakashi, but his
sacrifice was worthless since she died...Second Minato didn't
learned anything from supposed Obito death, since this time he also
left, for some ,,important'' job, leaving two kids to fight against
more powerful and more numbered enemy...So I think Obito enjoyed
Nine tails attack, because he wanted that his sensei and his family
suffer, as he did, because of Minato's not caring for his students,
leaving two of them to die unprotected...After that he just started
acting in his act, and just concentrated on his plan...