And it's really more than 87% white. A lot of whites get classified on the books as Hispanics for diversity numbers (like Zimmerman was a "white Hispanic")
Whites are more conservative than blacks. If a group is disproportionately white, and especially in a military context, it will be disproportionately conservative. Literally everyone associated with the military knows this. That's why all the sjws are trying to overhaul it.
I've done enough to fix your ignorance. You just seem determined to keep it.