Kelvin Bell told you that knowing damn well it would trigger you, you do know that right? If it was a former player that rooted for say ISU, he would say ISU. Etc.
That is because clapping is not exclusively used for offensive purposes in a football game. Clapping to get the attention of the defense has been done since the beginning of time by coaches. Nebraska has had this problem for years. Ya change coaches but not a cadence? come on, man!