All I really know is that Rumsfeld came into the Pentagon to change the way the place works, and that is not going to make you a lot of friends among the Generals and Admirals who work there. And I know another leader who did the same, in his day and with his general staff. That leader's name was Winston Churchill. When Generals grumbled that he promoted people for -- gasp! -- MERIT (as opposed to seniority), he responded, "The Army is not a club." And when Admirals griped that he ignored naval tradition, he snapped, "Shall I tell you what naval tradition is: rum, sodomy, and the lash. Good morning, gentlemen."
This is not to suggest that Rummy is a Winny, or even in his league, but if ya get that many brasshats that mad, ya can't be all bad!