Because he's a product of the cold war, Zbigniew Brzezinski isn't capable of some simple 'can't we call get along' vision that would mean scaling back the rapacious greed and violence of the United States.
Other than that he's a bully, but he's by no means the worst and along with Brent Scowcroft and Heinz Kissinger is a good indication of the eminence grise view of US imperialism. A stable view not a neocon ultraviolent Zionist view of world geopolitics is needed. Thank God.