Is Cal's brother, Aron (Richard Davalos), made to look overly unsympathetic in this picture -- and is it a flaw of the movie?
The focus is on Cal (James Dean), and while that's not necessarily wrong, the audience winds up dismissing Aron as a goody-two-shoes (when his affection and concern for Cal seemed to be sincere, at least in the beginning) and then when Aron turns on Cal near the end -- and not without some reason -- the audience resents Aron further for "betraying" our Jimmy Dean who, though not really "bad" had certainly done some baddish things.
Does the audience wind up holding Aron to an impossible standard while giving Cal the benefit of the tortured doubt at every imaginable turn?
And, if so, what could have been done to adjust that?
Just the facts, Aron's always been the one more like his father so he was always the favorite who could do no wrong because he never did wrong, and Cal couldn't ever catch a break no matter WHAT he did.
Yes he is and I suppose it would've been better to show the juxtaposition of Cal hugging his father at the end to Aron dying in WW1.
Aron was spoiled and this had prevented him becoming a well-rounded man, but as you say, he was sympathetic towards Cal to begin with and even though Cal had an upward character arc, Aron's downward arc into madness seemed like it wasn't much explored. After all, it was Adam who was arguably the real 'villain' of the story.
Well, in the beginning, Aron had Abra and his father's love unconditionally. As the story progresses, we gradually see Cal invading that unconditional love. Certainly, the point can be made with Abra. But with Adam, he loved his sons equally, despite the fact that Cal was the problem child and Aron took up the good side.
Adam was not the perfect parent, but then again, no one is, and he was forced to raise the boys by himself. Unfortunately, the boys in their minds, believed one was loved more than the other. Aron certainly believed that. When Cal was trying to "earn" his father's love and respect, in Aron's mind, that was an invasion of his territory, and thus he became very defensive (and with Abra caught in the middle, sort of a causality of war). In their mentality, Cal tried to open the door, in regards to his father, while Aron tried to close it at every turn. It is there, where the audience found the sympathy for Cal and saw Aron as the obstacle (which was broken figuratively and relatively, when Aron broke the window of the train with his head).
That unfortunately, we don't know, because we are seeing this from the viewpoint of Cal.
For me, the most striking scene is when Adam is discussing his bank account with his boys and how most of their money is just about gone, to which Cal assuredly replies that he should not worry about that (because of his secret deal with Will Hamilton). Then we have Aron quietly and sinisterly repeating what Cal had just said. For me that scene represents Cal slowly opening the door to Adam's love, while Aron helpless to close it, can do nothing but sulk (but again, all from the viewpoint of Cal).
One scene they cut (it's on the DVD) that perhaps they should have left in occurs after Adam forces Cal to read the bible verses and Aron, uncomfortable, leaves the table.
The cut scene takes place in the brothers' bedroom (no, not the silly B&W screen test where they start fighting homoerotically, wind up on the floor, and Aron squeezes some part of Cal's lower anatomy -- probably a quad muscle). The color version of this scene, rewritten considerably by the time they shot it for real, has Cal come into the bedroom and, in shadow, goes on about how his father doesn't love him and then sits in a chair in the foreground. Aron then gets off his bed in the background and comes forward, sits nearby, and gently tells Cal that he needs to take more of an interest in their father's activities like the lettuce business.
The scene could have been important because it reveals that Aron's relationship with Dad is less perfect than it looks because Aron has long learned to play his father in order to be seen as the shining son. It's also the most human Aron seems in the entire movie.
I'm not sure why Kazan or Jack Warner decided to cut the scene -- perhaps it was seen as slowing the picture's flow, but the moment goes the furthest in making us understand Aron and his own issues and shows that he has a certain affection for Cal somewhere that's actually genuine.
Without that scene, Aron is reduced to a goody-goody cyborg that we resent unquestioningly because he's getting in the way of Our Boy Jimmy.
Aron is meant to become like his dad. The kept describing him as like his father but towards the end he seems and sounds very much like his dad. The turn happens about when the war happens I think and I think when the war happened he was "killed" like Adam was "killed" when Kate left him.
The only time I disliked Aron was during the birthday party scene. The rest of the time I was sympathetic towards him. His eventual fate is tragic and what Cal did to him is terrible, almost unforgivable.
If anything the movie makes him more sympathetic. The above mentioned deleted scene - if it were included in the final film - makes Aron seem more manipulative than you'd think. He essentially knows how to play people to attract them. Abra is initially attracted to his act of being a pure, good son but she's drawn to Cal because he's flawed but still good underneath it all - as opposed to Aron's fake act of being perfect.
You have to wonder if Aron being sympathetic to Cal at the beginning is just another way of looking down on him. It's easy to be sympathetic when you know he's not a threat. But when Cal starts becoming a threat, his attitude changes.