TRex's practical, pragmatic comment ought to be the official, announced position of UND: Move on.
I think most people do not judge UND generally by the actions of some of those attending the sorority party. But, the fact that the party occurred and involved UND students seems to be a clear warning sign that UND as an institution had better start getting out the word that the name change is inevitable -- apparently some have not gotten the message; or, if they've gotten the message, they persist nonetheless in providing evidence of why, in the minds of many, the name should be changed. If the school doesn't start pounding on the fact that a new name is coming, when the new name is announced, there will be idiots like those at the party who will cause trouble.
I know there's the group trying to hold on to the name, advocating the tradition, honor etc. That's a losing battle (just consider the sorority idiots and their friends).
The next few transition years can be very trying times but, they can also be some great times. Why remain bogged down with the name fight? As TRex said: get rid of the name and move on.