> Many US universities have required prospective employees to demonstrate their adherence to preferred ideological stances, during processes for hiring and promotion
That does not mean the Democrats control hiring decisions at universities. This would be like saying the Republican party controls CFO hiring decisions because corporations might filter for people who are fiscally conservative.
All organizations look for "culture fit" when making hiring decisions, and the culture of a university is one that is typically open and accepting of people from all walks of life. It's counterproductive to hire who think "empathy is a fundamental weakness" for example. They don't fit well with fostering a welcoming educational environment for young people, so typically we look for some degree of empathy in candidates, people who want to build community, foster individuals, and yes, who value diversity.
Notably, this filter is not very good at preventing conservatives from being hired and promoted and admitted to universities, because that happens every day.
> but also discriminated against some individual students due to their race.
This thread is about Democrats ostensibly controlling schools. That some schools were found by a court to racially discriminate in their admitting practices is unrelated, nor does not show affiliation to the Democratic party was used as a filter for hiring or admit decisions.
> a conservative white man filed a complaint against Cornell.
Well, no. From the link you provided:
I’m an evolutionary biologist, a liberal
Anyway, diversity statements were never about being a political litmus test. Diverse hiring pools are not a white filter. These are just something butthurt people say when they get an outcome they don't like. This seems more a case of a failed scientist being rejected for a tenure track role and blaming discrimination instead of his middling research agenda.