Why Itachi Killed His Own Parents?

the uchihas were plannig to attack konoha and they used itachi to spy on them but secretly he was working with konoha. so the village elders and the third hokage orderd him to kill them. but he would have been able to stay i konoha if he killed all of them but he loved sasuke soooo much that he ruined his own life so that sasuke could live. after itachi dies madara told sasuke every thing so now sasuke wants revenge on konoha. so itachi was a good guy after all :P

yea. he used to be anbu, so as part of his job, he spied on his clan, because they were planning to conduct a coup d’état , and itachi knew that this would lead to another Ninja War, so he had to kill the entire clan including his parents but not sasuke.

it was given to him in the form of a mission(long story)

All Danzo's fault he cause loads of problem to everybody

itachi killed his family because konoha and the elders and the third hokage ordered him to..... read the manga or watch the anime to find out more detail or look it up online....

He was training

cuz he had to i <3 itachi