Why Does Jim Boeheim Have To Be Such An Asshole?

Last year I actually defended Jim Boeheim when the rest of the world was calling him an asshole for his unvarnished assessment of Tyler Ennis's pro potential.
But I can no longer defend him for making nasty comments about his own players.
About freshman point guard Kaleb Joseph, Boeheim said "He's just not really a point guard yet. He's trying to learn how to play point. It's going to take a long time, too."
If you evaluate this statement based on how true it is, it could be fair and accurate for an outsider to say, but it's totally rude, insulting and counterproductive for a coach to say this about his own player.
And even worse is what he said about Chris McCullough who was projected by some (though not Boeheim) as a potential lottery pick in the upcoming NBA Draft: "He's a lottery pick, I don't know how he could possibly struggle against Colgate. It just doesn't make sense to me. I've got a better chance of winning the lottery and I don't buy tickets."
There is absolutely no reason for him to be so rude, condescending and downright insulting about someone for whom Boeheim plays a large role in his success. Why is he constantly tearing down his own players in the media? Does he think they're arrogant and need to be taken down a few pegs so he can build them back up? He's not a drill sergeant so more likely he's just an asshole who doesn't care about the players.