I have no doubt that, in the modern era, there are plenty of Australians (and Brits, and kiwis, etc.) who have every bit as much balls as Americans do.

The problem is, in the modern era, that we no longer live lives fighting to survive daily. We have all become fairly soft and accustomed to our luxury. So, when tyranny like this rears its ugly head, there is a transition period in which your average modern man has to go from his daily life of comfort and stability to realizing that his world is crumbling, and that a proper response is called for, that if he doesn't go the full measure, he'll lose it all. The difference between the Americans and the rest is that, once that transition in thinking is made, only Americans still have the means to give that proper response.

All the balls in the world won't matter without the means to employ them effectively.

As long as we have the guns, they can't get their way.