Who is Uchija Madara?

Answer 1

ANSWER

Madara Uchiha is the REAL founder of the Akatsuki and the one that unleashed Kyubbi on Konoha. He lost to the 1st Hokage and wanted vengeance so he "controlled" 9 tails.

Tobi seems to be young, around Itachi's age. I know Tobi and Madara are the same person. the reason why madara has lived for 128 years is because of his ETERNAL MANGEKYO SHARINGAN. he gained this when he combined his mangekyo with his brother Idoshen.

it is Idoshen who is the most skilled of the Uchiha (and the first to activate the mangekyo sharingan) and not even Itachi could have managed to kill him (without the Mangekyo Sharingan which he didn't get until he "killed" him). The dude is the best at teleportation and gen-jutsu *so he can make himself resemble "Tobi"*

Madara may have trained itachi uchiha, but he really wasn't the one who told itachi to kill the uchiha clan. it was the elders of konoha.

also many fans speculate that Tobi is Obito uchiha. this is highly unlikely because one:

obito was crushed by a boulder.

Two:

since he was crushed by a boulder (his whole right side actually) he wouldn't have his right eye (which is the only eye that Tobi sees out of.) and the right side of his body would be mangled. PlUS, obito gave his left eye to kakashi therefore leaving obito with NO eyes.

on top of that, the naruto manga thus far has already clearly speculated that Tobi is in fact Uchiha Madara.

to understand him further check him out on the naruto wiki.