One thing to remember about the “25 million” figure...
Ayers was thinking 10% of 250 million at the time.
After the race wars the plan was to divide the country into 3 sections.
IIRC, it was to be divided up with the USSR, N Vietnam, and China each getting a 1/3.
The 25 million number for extermination would be people still alive after the race wars and occupation wars, people that had been rounded up and placed in camps for reeducation but couldn’t be reeducated.
The total number of dead would far exceed 10% of 250 million.