 Nyorai kupfuurira kweiyi ndima - Chinyorwa chake chakawedzerwa kuti chibatanidze mifananidzo isina kupfeka uye kutamba kwemazuva ano uye na1930, Katz akanga ari mumwe wevanyori vemifananidzo vanozivikanwa zvikuru muVienna. Akatora rutivi mukuratidzira kwakawanda kwemifananidzo uye akakwezva vadzidzi. Pakati peavo vakadzidza naye paiva naHans Popper akazozivikanwa saJohn H. Popper, naAnton Josef Trčka. Apo vaNazi vakasvika musimbapakuvamba muna 1938, Katz pakutanga akabvumirwa kupfuurira kudzidzisa. Kusvikira kuKristallnacht, akapfuurira kudzidzisa uye akabvumirwa kubudisa mifananidzo nokuda kwavaJudha vakabva kune dzimwe nyika. Nemhaka yokuti akanga ane mvumo yokubatanidzwa mubhizimisi, haana kuiswa pasi pekuongororwa uye akakwanisa kubvisa bhizimisi rake uye kubvisa nzvimbo yacho pasi pemitemo yechibvumirano chake chebasa pana April 30, 1939. 