Here's how my "CEO for a day" fantasy would work...
The DEI department is de-solved immediately. All non-work slack channels closed. The new hiring strategy is merit-only, using tests that are as neutral as possible, with transparent salary scales and promotion paths. Equality but not equity.
Anybody having a problem with this policy, stirring up shit, doing walkouts, trying to get colleagues fired and other wildly unprofessional behavior can leave.
Surely many think this is aggressive and that I'm a creepy authoritarian. No, this cleans up the obnoxious 5% that makes everybody's lives miserable, so the outcome is a pleasant, fair and peaceful workplace.
A DEI department is a discrimination machine. Division is their output, because if there is none, it's obsolete.