PARIS—A French man has been sentenced to life in prison for stabbing an 85-year-old Holocaust survivor to death in an antisemitic attack, a case that triggered widespread outrage and called attention to resurgent anti-Jewish sentiment in France. After horror and grief, Mireille Knoll’s family feels justice after Wednesday’s verdict. “We are exhausted but glad that they recognized the antisemitic nature of the attack,” her son Daniel Knoll told The Associated Press. The verdict “was appropriate for this horrible crime.” Knoll was found dead with multiple stab wounds in March 2018 in her apartment, which was then set ablaze. Tribute marches were held around France to honor her and denounce racism. President Emmanuel Macron attended her funeral and said the attackers “profaned our sacred values and our history.” Yacine Mihoub, a neighbor who grew up in the Paris public housing project where Knoll had lived most of her life, was convicted …