This had a serious effect on Kakashi. From that day, Kakashi started completing mission without caring about his teammates.
On one such mission during the third great shinobi war, Rin was kidnapped by the Hidden Stone shinobi. Obito wanted to save Rin, but Kakashi put the mission first.
After a small fight, Obito decided to go alone. He left Kakashi with the following words-
If I’m going to be called scum either way, I’d rather break the rules! And if that’s not being a proper shinobi, then I’ll destroy that idea!I believe the ‘White Fang’ is a true hero!
The words by Obito had a huge impact on Kakashi, so he went to the enemy territory to backup Obito.
Taiseki, one of the enemies turned invisible using the Hidden Camfoulage technique and tried to attack Obito, Kakashi saw through the attack and protected Obito, but ended up with injuring his left eye.