(JTA) — Picture a cute-looking, 6 1/2-year-old girl with curly braided hair. She is standing on a sidewalk, on a cold, dreary day in Leipzig, Germany, together with her parents and my wife and me. My granddaughter Vivi is staring intently at a 75-year-old worker, kneeling on the ground. He is digging a hole through the pavers to install several 4” x 4” brass plaques mounted on cement cubes — memorials to relatives who perished at the hands of the Nazis more than 80 years ago.

In February, we traveled 9,500 miles round-trip to dedicate 12 Stolpersteine plaques in memory of relatives...