well, what'ca think?
i feel that itachi actually did kill his entire clan in order to safe konoha and world of ninja(maybe) from the man that use jutsu like oro did.
the reason i figured like :
1: itachi one of the genius and great ninja among all ninja in konoha at age 13
2: he's being ANBU Leader and known oro activity on kinjutsu
3: cannot do anything on oro coz of hokage stop him(maybe)
4: realized that he cannot do the same thing like hyuga clan on the branch family
5: had to kill his entire clan include his parents in order to not let oro from gettin' sharingan so easily
6: fully trust on his younger brother, sasuke self
7: had to run from konoha so that everybody can figure him as a criminal than sasuke also can live on focus to become stronger than himself
8: join akatsuki to playin' with oro..to tell that oro not at his level
9: keep on akatsuki coz wanna still keep in touch with sasuke???
10: let sasuke train under oro becoz just like reason no.6
but this only what i yhink all'bout...what'ca think i...don't...know...