The ISU fan looked like a mouthy first class douche in my opinion. Was a season ticket holder for 25 years and NEVER yelled at the coaches or players like that.
Ya I think what set him off in particular was yelling it at him in front of the players more than anything else.
Even if it's directed at him and not the players, and even if the comment was completely true (which I don't think it was), it DOES impact the kids if there were to be a coaching change looming or eminent.
Say what you will about CMC, but he takes that kind of stuff pretty seriously. Personal feelings aside, he's not going to take kindly to ANYONE on the outside, fans or otherwise, saying anything that might impact the players mentally in a negative way, whether it's warranted or not.
I think it's safe to assume that will always be the case with CMC for better or worse.