The most delightful, professional pilot I ever flew with was from Addis. In the middle of a crew room group of inebriated, and appropriately noisy Aussies, this man entered once, and the Aussies who knew him from prior airlines fawned over him; he was that sort of person. The same program had pilots from some 90 countries, and they varied in their skills, and character, but they generally did a job. Flying with one or the other wasn't so very different, except for the occasional person who would have stood out in any program, for better or worse. Of these, the distribution was pretty much random. That operation was in a location where the book "Cultures Consequences" and it's riveting sequel was appropriate reading.
There is more that we have in common than we are usually prepared to admit.
As a group, tossing the holy hand grenade of Antioch at the group that you have a grievance with is hardly good CRM or consistent with achieving harmonious flight decks. Aussies can be a PITA, just like every other nationality on the planet.