About a month ago Costco had "Unfit for Command" hidden in the middle of various books, mostly by left-wing authors, including Bill Clinton's which got a prominent display of several rows. My wife and I moved the "Unfit" books to the front row (pushing back a row of Clinton's book). Last week "Unfit for Command" was moved to a slightly better position, holding a single row about 4 or 5 books deep; but it was beside Kitty Kelly's book which held the prominent corner, 4 or 5 books deep on both sides. Costco loves those Bush-bashing books. No doubt.
The guard should have asked permission to be there. If I were a private business, I would want to support the military in any way that I could, but they do have the right to ask them to leave.