Naruto Primer: Gaara
Eyebrows
Gaara is quite the psychopath.
You can ask just about anyone he has ever come in contact with and he will tell you what he thinks of Gaara. Most would probably reply that he's evil and mean and mean and scary. Others wouldn't be able to answer because they would already be dead.
Gaara really doesn't have a reason to hate most people. Sometimes, he just hates them because he feels like it. Occasionally, he just doesn't like the way that person has looked at him, or something that that person has said simply offended him in reasons that couldn't possibly be explained! However, sometimes people keep him waiting at tournaments for a long time and don't even care that he's been itching for a battle!! COUGH COUGH!
But anyway, we can understand why Gaara would want to kill and hate Sasuke. Though, what's his reason for hating Lee?
You could say that he hates Lee because Lee was the first one who EVER hit him. EVER. But we think it's deeper than that.
I can't think of any OTHER reason to why Gaara would want to kill Lee so much other than the relation between their eyebrows. He sees Lee standing there with his monstrosity of a set of eyebrows and it just sets him off into psychoville. After all, in case you have failed to notice, Gaara possesses NO eyebrows AT ALL. Not even a little line where they used to be or where they would potentially be.
I would say that maybe they were burned off or plucked off…but that wouldn't make sense because his sand would protect him from such events. So that means he must have been BORN without eyebrows.
Or maybe he had them before he was born, but they were stolen from him.
When the high and mighty Gods of the Brow were handing out eyebrows before everyone was born, Gaara received his and Lee received his right on schedule nice and early. However, Lee probably beat up Gaara and stole his eyebrows and then ran off to be born before Gaara could take them back.
Remember, this was BEFORE Gaara was born so that means that he didn't have his sand to protect him from Lee's wrath. Because Lee was so cruel and mean BEFORE he was even born, that's why Lee can't use anything except for taijutsu and why he's so gosh darned nice NOW but that's a whole 'nother story!
Now Gaara harbors a deep resentment toward Lee that he can never forget. It's not so much that Lee stole his eyebrows. It's more the fact that that memory is the earliest thing he can remember. And it's BAD.
One might think that we completely fabricated this entire story up out of nowhere.
We choose not to touch on that subject.
But remember when Gaara said, "I don't know why I want to kill him. I just want him dead." Or something to that extent. But this is why. How else could you possibly explain Gaara not knowing why he wants to kill Lee?
Every time he sees those eyebrows, he's thinking, "…Those are mine." Even though killing Lee will prove nothing, it will give him the revenge he craves!!