The rest of us would be outraged, just like we’re outraged about the original crime. Donnie wouldn’t actually care because it wasn’t his throat or a black or brown person killing a white person.
He doesn’t actually care about the troops, except as props or as fellow white supremacist travelers.
As an explanation: I couldn’t care less, but since clearly size matters in his toxic-masculinity world and he is clearly so insecure that he can’t admit to anything else… this is a shot at that attitude, not anything related to anyone else’s anatomy.