It was not that he had a post there but his wife was Russian and the move was probably aimed at finding somewhere where they could feel at home. Certainly Ehrenfest had mixed feelings about his own country given the anti-Semitic attitudes he had encountered.
Ito ay hindi na niya ng isang post doon ngunit ang kanyang asawa ay Russian at ilipat ang marahil ay naglalayong sa paghahanap sa tabi-tabi kung saan sila ay pakiramdam sa bahay. Totoong Ehrenfest had magkahalo damdamin tungkol sa kanyang sariling bansa na ibinigay ng anti-Semitiko saloobin niya encountered.