I agree that this one picture doesn't prove anything. And having known Big 8/Big XII officials, I know they're not biased. However, data is data, and over the past several years, Nebraska is either the worst-coached offensive line in the business, or there's an unconscious bias not to call holding on teams that have a reputation for not holding. Officials make mistakes, and those mistakes seem to be adding up against Nebraska this year in a way that isn't necessarily preventing them from winning, but it's preventing them from putting forth their best effort.
And you just think I'm sane because I've chosen to live in Iowa City. My family questions my sanity for that same reason.
As for racism on the Hawkeye team, I have spoken to exactly one former black player (from back east), and while he wouldn't take sides on the lawsuits, he absolutely said his experience (2016-2019) was more difficult than expected because of his race.
Like most issues in our world today, neither the holding problem at Nebraska nor the racism problem at Iowa proves that officials are inherently biased or that Iowa's program is plagued by systemic racism. But clearly Nebraska needs to investigate why we're called for holding so often, Big Ten officials need to continue to review their performance to include whether they're calling holding in a consistent manner, and Iowa needs to continue the difficult work — already begun — on why so many black players feel uncomfortable at best and discriminated against at worst.
Be well, and though I work at UI, I still have trouble rooting for Fran, though his sons and the rest of the team are good people.