 Together with his brother Carl, and as many German "Bürgertum" kids of his generation, Hans had joined the Wandervogel, a naturalistic German Youth organisation very popular at that time, which promoted ideas like Youth Hostels.However, already before World War One, anti-semitism became quite virulent within "Wandervogel" and Jewish members were being systematically discriminated and pushed out.As a result, Jewish former members of Wandervogel, amongst them the Beyths, formed "Blau-Weiss", a Jewish Youth organisation, as early as 1912, also very early embracing Zionist ideas.