So long as folk are unconscious of their motivations, they will always believe their own culture is the best with some exceptions. We think we are motivated by all kinds or positive values and principles but don't see our dark hidden side. We hate ourselves, were made to hate ourselves as children and told that only in conformity to the values of our parents would we be safe. We learned we would be punished if we did not obey and to not obey is therefore bad. So we had to die to what was natural for us and take on a mask. That mask is our ego, the exemplar of all that we were taught is good. And we are an exemplar of our culture, marching moronic sheep. We would now rather die than open up our minds to the possibility we were brainwashed. To be brainwashed is bad and we are good. We can't allow ourselves to know how bad we feel
Now occasionally a rebel comes along, and not really so occasionally, but often, and he, out of the same self hate, rejects his culture. He decides his ego is better than other people because he is different and more fair. But it's that same old self hate.
Culture, nationalism, any thing you identify with out of your ego, is a disease, a trap you have stuck yourself in. To be objective you must die to everything you hold as sacred. You must be unattached to any thing idea ideology culture, team, party, etc.
But because of your terror of what we experienced as a child and the depth to which we buried it, we probably won't ever get free. Only by seeing the tremendous danger we face by attachment, will we even have a chance.
The world is dying because we want to stay asleep.
When asked about western culture Gandhi suggested it would be a good idea.