In 1938, at the age of 19, he moved to Mandatory Palestine, making the journey on a ship with almost 1,000 Jewish students from all over Poland enrolled at the Hebrew University of Jerusalem.
[1][2] He travelled on the ship with fellow student and Zionist activist, Blanca Stein; they married the following year, in 1939.
[1][3] In 2005 at the global congress of WJA in Shanghai, China, Nener received a medal in honour of his contribution to peace and the rule of law.
[2] Nener was one of the founders of the International Association of Jewish Lawyers and Jurists (IAJLJ), and served as Deputy President.
In June 1998 at a conference of the IAJLJ in the city of Thessaloniki in Greece, Nener cautioned that “the international revisionist movement, using the Internet and an orchestrated propaganda campaign, could warp the historical memory of younger generations;” and that "the denial movement has a historical institute which is reviewing history and whose real aim is to deny the Holocaust.”[4] In June 1999 in Berlin, Nener warned that "there are some very disturbing signs" of rising antisemitism in Germany and across Europe, but that "Germany is one of the few countries in Europe which has adopted legislation" to fight these trends.