DEI was weaponized in the USA, where in quite a few instances, people couldn't get promoted or hired because of their race (typically white or asian). It was about preferential treatment, where you would get hired because of your race, and not merit.
I am all for diversity, I am all for fairness, and I don't think we should exclude people based on the color of their skin or their socioeconomic status. Yet, that is exactly what DEI did, and I have seen it firsthand many, many times.
PSF is just being stupid (or pragmatic) about it.