Basically, it doesn't. As per the Charlotte Observer, who did an interview with ACC commish John Swofford:
Q. Do the current allegations at Syracuse change anything regarding its pending membership into the ACC?
"First and foremost, the alleged behavior of the individual in question has no place in our society and evokes a myriad of emotions. I know the Syracuse administration is focused on appropriately reviewing and responding to the situation. In regards to Syracuse's future membership in the ACC, this does not impact our decision."