Oh man, I'm a bit late to the party here.
He really believes the far-right Trump propaganda, and doesn't understand what diversity programs do. It's not a war between white men an all the other groups of people... It's just that is has proven to be difficult to for example write a menstrual tracker with a 99.9% male developer base. It's just super difficult to them to judge how that's going to be used in real-world scenarios and what some specific challenges and nice features are. That's why you listen to minority opinions, to deliver a product that caters to all people. And these minority opinions are notoriously difficult to attract. That's why we do programs for that. They are task-forces to address things aside from what's mainstream and popular. It'll also benefit straight white men. Liteally everyone because it makes Linux into a product that does more than just whatever is popular as of today. Same thing applies to putting effort into screen readers and disabled people and whatever other minorities need.
If he just wants what is majority, I'd recommend installing Windows to him. Because that's where we're headed with this. That's the popular choice, at least on the desktop. That's what you're supposed to use if you dislike niche.
Also his hubris... Says Debian should be free from politics. And the very next sentence he talks his politics and wants to shove his Trump anti-DEI politics into Debian.... Yeah, sure dude.