I don't have a problem with Kelly being brash and with his "get used to it" response. Truth be told, I liked it when coaches like Holtz, Parcells, and Cowher made statements like this.
My problem is that he said that after he f'ed up and made a horrible decision that cost his team a win against a team with inferior talent. This will sound opinionated, but I also don't feel like he he earned the latitude to use a phrase like that at ND, he hadn't established the appropriate street cred. It was a tough guy comment from a poser.