Board Thread:Theories and Speculation/@comment-31099706-20170327120301/@comment-734582-20170521071643

BlazeRelease wrote: And I think I heard that Itachi's character got changed during the part 1's ending or part 2's begining. Itachi was always meant to be a good guy, or at least to have good intentions. The exact way however, was something Kishimoto didn't decide until later. If i recall correctly, when Kishimoto married he thought Sasuke deserved a better brother and so you can see a noticeable change between Edo Tensei Itachi and the living one.

BlazeRelease wrote: Well we don't fully know if he let Kakashi live by Tsukuyomi or not but considering Itachi already unnecesserily killed alot of innocent Uchihas(like his mom,Izumi, Uncle and Aunty, and other possible innocent Uchihas too), I wouldn't see a reason for him to blow up his cover by leaving a old friend alive. I think Itachi considered kakashi a great threat and decided to use Tsukuyomi to avoid any major battling. Itachi didn't straight up kill him when Genjutsu'd because there's a backlash after using the technique which he was hiding very well.