Joe Biden just threw a particularly nasty insult the way of Japan, a close ally of the United States, at a campaign event. The president accused the Japanese, along with China, Russia, and India, of being ‘xenophobic’ in their reluctance to admit large numbers of immigrants, and of damaging their economies as a consequence: ‘Why is China stalling so badly economically, why is Japan having trouble, why is Russia, why is India, because they’re xenophobic.