LTG William Boykin is not really able to "speak his mind." As a retiree, he has to watch what he says and does to a degree that would probably surprise most Americans. His "crusader" rhetoric is old hat, of course. No one really believes there is a crusade going on right now; we're disengaging from the Middle East and our wars of choice didn't really turn out so well for Boykin and his ilk.
You can pass anyone off as an expert, but, really, what is Boykin an expert of? Certainly not diplomacy, common sense, or self-control.