Just as I said.
Not a great idea to butt in on a rival when not involved.
No big deal with you are a neutral party.
See my examples for the former -- Iowa/Iowa State games when one is not playing the other, Michigan stuff when going to an Ohio State game, things like that.
See my examples for the former -- wearing ISU gear when watching Notre Dame and Virginia play or any other ACC match-up when ISU does not have a dog in the fight.
It's not that hard to figure out.
Unless you want to cherrypick and ignore context.
Your first post said it wasn't a big deal. I just want clarification because it seems you're hedging.