Imo, it is notable that the target is pretty much everyone in the world who is not Australian ... its an amporphous pulling of the collective leg ... no nationality is singled out.
I doubt there would have been many complaints if the people that new arrival approached were from New Zealand, England, South Africa or Tasmania.
Jokes pretty much depend on an element of surprise or some form of pathos ... to be hyper polotically sensitive is not basically not read jokes.
