PARIS (AP) — Like many who survived Nazi horrors, Mireille Knoll embraced life, eating out and going to the theater despite limited means. Even as age and Parkinson's disease took their toll, she delighted in receiving guests — until one of them allegedly stabbed the 85-year-old to death because she was Jewish.

The brutal killing in Paris last week has raised uncomfortable questions about resurgent anti-Semitism in France.

"I thought I was going to die on the spot. I cried all the tears in my body and I thought of her. She didn't deserve this," her anguished son, Daniel Knoll, told The Associa...