Lomu, Well that's a relief. You think China couldn't attack Australia. China didn't threaten to "Invade" it threatened to attack bases. I would have thought it had the technology to do that.
It hasn't threatened to invade but if it wanted I would expect Mascot Airport to be the entry point rather than WW2 landing craft.
Have you caught a train into the Sydney CBD recently? There are quite a few Chinese already here. Do you think that many could be interned as we interned Germans in ww2?