I'm not sure if you are aware of this, but the iu sucks chant has not happened at Mackey in life 5 years. The only time is when we play iu. Which is completely acceptable for a rivalry. If you want to act like iu is somehow above this, I was at assembly hall for the last game and heard the student section chanting "F*ck Purdue" and F*ck Zach Edey". Last time I was there was the Matt Haarms tip in and they did the same thing to him.
You are correct that the student section chants iu sucks after kickoff at Football games, that is it. You saying it happens at every game everywhere is simply not true. I'm not sure why this is such a big deal, it's a rivalry. Alabama football chants the below thing when singing Dixieland. Does this make Alabama football a little brother to Auburn, LSU, and Tennessee... I don't think so, their results speak for themselves. Personally, I think finally beating your rival at home and rushing the court two season in a row like it's your Super Bowl is more embarrassing.
"A little turtle dovin' on a Mason Dixon night (F**K AUBURN),
Fits my life (AND LSU), oh so right (AND TENNESSEE, TOO),"