He saw his brother kill his family and later found out it was actually Konoha who ordered it.....On top of that he had to kill his brother before he found the truth out (Madara/Tobi told him.) and his hatred grew
possibly hatred
most probably hatred
Hatred and lust for revenge
Uchiha Sasuke.
Uchiha Sasuke.
While no one knows for sure, it is unlikely that Sasuke will kill Kakashi. Kakashi is older and more experienced than Sasuke is, and he is not blindly steered by hatred the was Sasuke is.
Sasuke is "blind" by the hatred he has for his brother. Itachi had shown him that he was responsible for the Massacre. The whole reason behind it was to make Sasuke stronger.
Sasuke's full name is Uchiha Sasuke, he does not have a middle name.
Hatred
In recent chapters, in volume 50, he says he plans to "throw Sasuke" at Naruto, or force the two to fight if Sasuke doesn't want to. Madara believes Sasuke is one of the key players chosen by fate to use the curse of hatred that the Uchiha clan bears to destroy the world, and he even compares Sasuke and Naruto to himself and his enemy, the first Hokage Hashirama.
As of yet no....he wasn't happy when he finally killed his brother..but then Madara told him that it was Konoha's fault and that they set up the Uchiha clan and forced Itachi to kill them all. So now he has a new hatred.
NO! Of course not Naruto and Sasuke are still best friends but also immortal enemies. Actually if you've been reading the manga, Naruto said that the next time he and Sasuke fight it will be their last and they will die together. Sorry but Naruto has tried to get Sasuke back and knows that his hatred has made him unreachable, meaning this is his only other option.