Pedzisa mutsara unotevera: Mharidzo yake yakawedzera kuti ibatanidze mifananidzo isina kupfeka uye kutamba kwemazuva ano uye pakazosvika ma1930, 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. VaNazi pavakava nesimba pakutanga kwa1938, pakutanga Katz akabvumirwa kuramba achidzidzisa. Kusvikira "
Kristallnacht", akaramba achidzidzisa uye akabvumirwa kugadzira mifananidzo yevaJudha vaitama. 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.