Your not going to find much support for ANY kind of armed populace amongst the very senior officers of the services. As they approach flag rank, their careers have to revolve around Washingon DC (known to me as the District of Criminals) and become immersed in the politics at the Federal level and almost universally, become "politically correct" in their behavior and ultimately, thought.
That McRaven has little regard for the Rights of the Citizen should not be a surprise and that he's actively working to thwart the ability for Citizens to defend themselves should be expected. After all, to those of that mindset, you have a duty to retreat and only "professionals" can be trusted with deadly weapons. Of course, government approved, trained and employed professionals.
What should be questioned is McRaven's suitability to continue as Chancellor of the University of Texas system.
If you're familiar with Colonel Hackworth, you'll recognize a "perfumed prince" when you smell one.
Jeff B.