To expand on this post, I had heard that the white guy was MCW's stepdad (not sure if true, but that's what they were saying in the student section, which was a few rows behind the two IU fans). Not sure if MCW's dad took so much offense to the Lord & Taylor chant, or if it was more of just the last straw kind of thing. I've been around more annoying fans in my life, but these two kids were trying to instigate a fight with the student section the entire night and security had to get involved at least a few times to settle everyone down.
My own perspective, I think white guy & MCW's dad were just tired of hearing these kids trying to start a fight the whole game and offered to take them up on the offer.
No fists were thrown or anything though, just a little yelling back and forth. I honestly didn't see MCW's dad yell anything at all; just the white guy.
Edit: Not sure what MCW's stepdad looks like, but this guy had kind of a shaved head and he seemed pretty tall. I know that's an awful description, but I'd recognize him if I saw a picture.