It's an honor," people keep telling the Klarsfelds. An honor to meet them, an honor to host them, an honor to sit down for lunch with them. In town to speak at a lecture sponsored by the Congregation Kol Ami synagogue, the Klarsfelds — Beate, who's 65, and Serge, 68 — are frequently described as "Nazi hunters." But, for the people reverently shaking their hands and thanking them for being here, they are far more. They are truth-tellers, the embodiment of conscience. -snip- "Many young Frenchmen," he says, choosing his words carefully though his English is flawless, "of North African...