I don't think it's that tone-deaf of an idea. I understand Iowa State won't do it because that would be 11 bcs teams on our schedule, and Minnesota probably won't but I don't think it's a terrible idea.
You don't honor a player being killed in a game by playing the team that killed him as an anniversary tribute. Neither ISU nor Minnesota should consider that a good idea without regard to the 11 BCS team schedule part.
You could do a lot of things to honor the anniversary, but scheduling Minnesota for the game should not be one of them. Austria, Bosnia and Serbia didn't schedule parades along the 'assassination of Archduke Ferdinand' route to celebrate the 100th anniversary of that assassination this year, I don't think.