truth
Sophia, good responses. Let me say something about some of them.
I was comparing love of one's culture with a sometmes blind loyalty to one's nation (or its government of the moment). Not the same thing.
Tribal loyalties very often have to do with defense of property and are probably very primordial. Patriotism, however, is most likely a product of the nation-state which is fairly modern in its emergence. It arose possibly with the development of kingdoms (out of primitive "states" or chiefdoms) and became nation-states personified by the king/queen head. It demanded loyalty to the king/queen. Here people are required to be loyal to the impersonal legal entity of the nation-state (not truly personified in "Uncle Sam").
"My country right" as opposed to "my country right or wrong", of course.
Your last point is more difficult to response to. Let me just say that the vast majority of young men and women who go to war for our nation-state do so with a very vague--and often naive--notion of what the goal of the war is. In their minds it's usually just a matter of "us" against "them"--like a soccer game. And this is also the case with warriors of other countries. Patriotism is "designed" to serve as a functional substitute for "good reasons for responding to the call of duty." "Duty" is another concept-of-coercion. You say that we go to war against others for good reasons while others go to war against us for wrong reasons. I've never heard you sound naive before.