Duda joins more than 2,000 young Israelis and others at March of the Living in Poland; 'We will never again allow something like this to happen,' he says

Justices say that while community did face antisemitism from the French regime during WWII, it does not meet the conditions set out in Israel's Nazi persecution law

One of 110 witnesses at seminal 1961 trial, Kleinman's testimony helped send notorious Nazi official to the gallows