LOS ANGELES—Robert F. Kennedy’s widow said today that his killer, Sirhan Sirhan, should not be freed, despite the recommendation of a parole board last month. “Bobby believed we should work to ‘tame the savageness of man and make gentle the life of the world.’ He wanted to end the war in Vietnam and bring people together to build a better, stronger country. More than anything, he wanted to be a good father and loving husband,” Ethel Kennedy, 93, said in a statement Tuesday. “Our family and our country suffered an unspeakable loss due to the inhumanity of one man. We believe in the gentleness that spared his life, but in taming his act of violence, he should not have the opportunity to terrorize again. “He should not be paroled,” Kennedy concluded. Sirhan assassinated Kennedy in June 1968 at the Ambassador Hotel in Los Angeles, as the New York senator and …