It's not like it's entirely the money or entirely being a SB champ, rushing titles winner, etc.
Does Zeke care only about the money? Doubt it, he has an ego, has to have to put himself through the pounding a running back takes, few if any people in general care only about ONE thing. And I'm sure he would like to be thought of as one of the best running backs ever in the league, in the situation he's in with the Cowboys currently - being on a team that is focused on running the ball as the focal point of the offense and having a top line to protect him, he has the opportunity to do just that.
NFL running backs have a relatively short career, this may be the only other contract he'll get, or at least the best one he'll ever get, he's 24 now, after a 4 year deal he'll be 28 and even if he's still a top back, teams will worry about the dreaded age 30 number in just 2 years after that. So it may be he's just trying to max out now, and not count on future contracts.
Having said that, though, I'm very displeased with him for not signing, especially if he's quibbling over a couple of million dollars of guaranteed money in a contract that will pay him tens of millions of dollars just in guaranteed money, the word greed comes to mind, regardless of how he views his possible future.
Certainly not going to buy Elliot jerseys or such, and won't look at him as a devoted Cowboys player, but understand this is the modern NFL, years ago guys wouldn't think of holding out, they'd honor their contracts. Zeke isn't the only one who's held out, Emmitt did too, over nothing but money, though not the exact circumstances. Other players have also held out such as Bell.
Basically I'm not a Zeke supporter, but then again I'm not saying get rid of him, I'll just use his production for the good of the Cowboys...