ちなみに該当の文章はこちら
>>50 This country has made a national pastime of wagging its finger at its neighbor, Japan,
national pastime 国民的娯楽
wag one's finger at (人)の目の前で人差し指を立てて前後に振る人・
動物をしかる時に非難を表す動作。 ちっちっちっ ですね。
which it regularly scolds for not teaching the "correct history"
scold 小言、説教する
about Japan's invasion of China in the 1930's, straining relations between Asia's biggest powers.
straining relations 緊張関係