During a 1924 trip to Mandatory Palestine, Fahn created a Galician Zionist colony there. Fahn himself thought about moving to Palestine the next year, but decided not to since he feared that Palestine would soon have an economic crisis. The decision by Fahn and many other Galician Zionists to stay in Poland ended up being deadly for them due to the Holocaust destroying most of Poland's Jewish population by 1945. In 1930, Fahn maintained a correspondence with Hayim Nahman Bialik.