According to the killer's statement, he did not intend to choose NZ for his attack, he was there "training" but then realized that NZ was as much a "target rich" zone as anywhere, so... He then made a point that by doing it there, the most remote and seemingly harmless place in the world, it would drive home the point that nowhere in the world is safe from the invasion of muslim hordes. It does seem odd, haven't we heard about many elites taking up second residence in NZ lately?