There's always a naysayer with a bad attitude, isn't there?
I don't swear fealty to any politician. But I would die to defend America's Constitution and Bill of Rights. The principles of social contract, popular sovereignty, federalism, and separation of powers with checks and balances, are all divinely inspired.
Patriotism is fierce gratitude for what your country's soldiers have given you, and a determination to not lose it. And no, I don't hate Brits, Canadians, Japanese, etc. I don't even hate Russians or North Koreans, though their governments are screwed up.