Certainly. And there can be many different ideas about what patriotism entails.
But when the author of the above post claims that patriotism is "an abomination", and says that people waving the American flag are no different than the people who waved the Nazi flag, I have to take umbrage.
Take all the umbrage you want. The U.S. military kills more innocents every year than all the other "terrorists" in the world put together. The fact that you were taught (very successfully, it seems) to worship the U.S. war machine doesn't make it good. Since you don't want to hear it from me, try reading "War Is a Racket," by Smedley Butler, the most decorated U.S. Marine in history at the time of his death. Maybe you'll listen to him.