Change in Itachi's personality


[![enter image description
here](https://i.stack.imgur.com/5cuc8.png)](https://i.stack.imgur.com/5cuc8.png)[![enter
image description
here](https://i.stack.imgur.com/nQmSL.png)](https://i.stack.imgur.com/nQmSL.png)

How much and how did Itachi Uchihaa's personality change after the massacre?

