DEI is valid under the constitution.

and being mandatory are two different things.

He thinks if he destroys diversity, he's paying back every POC who worked to expose him and then called him to account. In his very twisted mind, he thinks every white person on the planet will adore his actions. The only person who adores his actions is him. Although he is surrounded by like-minded people. I'm allegedly kind of wondering if there is an alleged junta, if the alleged crowd up against the wall will outnumber the alleged firing squad.

The reverberations will affect black communities. He is petty and vindictive and I am sure it bothers him that most black people despise him.
I imagine that losing out on government contracts will affect minority owned companies in a drastic way - which thus affects their ability to retain staff, leading to less jobs for black folks.
It also gives private companies license to follow suit.

After 2020, a lot of companies made promises that they never lived up to.
Before all this, awhile back I was reading an article that did a follow up to see how some of these businesses were doing since that DEI push after 2020. Many of them were not doing well after companies started pulling back - one lady was in tears saying that she was probably going to have to close her business.
1.5 % of government contracts went to black owned companies.
Over 600 billion dollars (federally) is awarded to private contractors.
To put that in perspective - 9 billion dollars.
9 billion dollars that may be taken out of black communities.
It gets even more insidious when you think about that environmental justice, healthcare DEI initiatives are also under fire.
Recruitment of black teachers, black doctors, also under fire.
There are a lot of studies that show that healthcare and education outcomes improve when you have more black teachers and healthcare providers.
The man is an evil racist. Sure he is corrupt but he is killing 2 birds with one stone.

...republicans just happen to be disproportionately white.

Yes, they have the goal of white supremacy in mind, and decisions from the top give cover to companies like Target to abandon their diversity programs and outreach.

But the issue of removing DEI as a federal government directive -what is essentially little more than outreach to tradionally overlooked groups for qualified applicants - isn't just going to drive minority employees out. It's going to reduce the pool of applicants by not reaching out to those marginalized groups.

More than that, it's designed to provide cover for packing government with Trumpers. It just is.