I'll be brutally honest, I can't remember the Coletti/Kimball incident all that well, so I couldn't reasonably comment. I have nothing against Karam personally, and I think if he can calm it down a bit he's a promising talent and an asset to the series.
That's what IndyLights are for. He may have raw talent, which is what Ganassi thinks apparently, but raw talent isn't race craft, these are big cars, long races and experienced drivers he's up against, with little to no experience in properly setting up a car. And he's all of what, 19 years old? I'll spot him this last race, but I'm hoping that he's learned that if he has a loose car, and he's stuck on the bottom, he'll think twice about shoving the outside guy up into the wall.