Just a theory but this is seeming more and more like a "dread pirate Robert's" personality. (hopefully there are people old enough here that get the Princess Bride reference)
The original masked attacker was Madara. This satisfies the questions of how come the masked attacker was an adult during the fight with the 4th hokage. Years after the kyuubi escape during 2nd ninja war, when Kakashi took the eye from Obito, Obito was found and saved by Madara. After being healed Obito was trained and raised by Madara after finding out about the death of Rin (hence him growing and reaching an elite level). This solution also satisfies the comments that Tobi obtained "his eye" during the battle of the bridge that made Kakashi famous.
As to why Obito is mad at Konoha and Kakashi, it is because of the death of Rin, whom Obito loved and cherished.
When Madara eventually died, Obito assumed the persona that Madara had developed and gave himself a new name, Tobi.
I believe this is the best and most likely solution for what has been going on. Any comments would be appreciated.
kennysan04: I believe tobi is a name that
represents a cause...In other words....tobi has
not always been the same person..It started off
with madara and when madara died his apprentice
picked up after....it would explain why he is
carrying out madaras moons eye plan....even when
the real madara was dead (and now revived with edo
tensei.) it would explain why he was there during
the fourth hokages time...it would also explain
why he pretty much knows everything; past present
and future. if tobi represented a cause then every
"tobi" would need to have access to the
same resources....and it makes sense because when
tobi was asked who he was…. recently he said
"i am no one" i guess u can say he is
kinda like Pain (aka) Nagato...As nagato
said..."Pain is the name that denotes the six
tht explains it all. umm one other thing ever
wondered if the eye itself was using a different
personallity while he was using the rinnegan
i've read the orgiginal manga. .. an it just
seemed the way he talked just seemed like another
person was talking at some points