My brother-in-law is about to be promoted to General. He started out fairly conservative, but he figured out the system during the Obama years. He fits your description pretty well. The last time he visited he told us that “diversity is the military's greatest strength”.
Maybe your brother in law should resign in favor of a minority
Did he say it in a robotic monotone, like "Raymond Shaw Is the Kindest, Bravest, Warmest, Most Wonderful Human Being I’ve Ever Known in My Life"*.
*Manchurian Candidate reference