No question about it: perception of a threat has a direct relationship to the hospitality–or hostility–with which U.S. forces are received. After a United States Navy sailor was confined on an American base near here, accused of the Jan. 3 beating death of a Japanese woman, 20 people held a protest at the base. One man held up a sign that read, in English, “Dear Sailors, Don’t Kill Local Women.” A decade ago, when three American servicemen were detained on...