No-ones saying you should fly the flag. Just wondering why you'd call someone a 'neanderthal' for being patriotic.
Theres no other deeper metaphor than displaying your countries colours. You stick together, you support your national teams and you salute your troops. You make your nation stronger at the grass roots level. If that means saying 'Gday' to old mate flying the flag across the street and not looking down on him as some kind of barbaric relic, thats what you do.
You've got a pretty cool flag, as flags go. Id be proud of it, and we are in away, its on ours too.
I guess we enjoy our little piece of turf and like to share it with anyone who decides they want to be Aussies too.
Nationality is an accident of birth. Take Cahill for instance. Samoan mother, English father, popped out on Australian soil. What's his heritage? The whole nationality thing is bunkem. Treat people as individuals, ie a fellow human being, and you can't go far wrong.