I just got back from a month-long journey in Scandinavia, Northern Europe, British Isles, and Russia, and my experience was the exact opposite of yours. Aussies, Europeans, Canadian, Brits, Asians, and Americans all mingled together. Thankfully, politics was not discussed and arrogance was not evident from any "group". Perhaps it is because these vacationers were used to travelling abroad. I don't know.