Whakakiia te rerenga e whai ake nei: Mai i te 1942 ka taea e Crüger te tuwhera mo tona mema o te Communist Party o Tiamana, a, i te 1943, i whakawhiwhia e ia te kawenga mo te whakaputa i tetahi putanga Switzerland o te pukapuka a te Movement for a Free Germany ("Bewegung Freies Deutschland") i tautokohia e Moscow. I te 1944 me te 1945 i kaha ia ki te hanga tautoko mo te nekehanga Tiamana Koreutu i nga puni mahi o Switzerland, a, i tu ia hei Hekeretari o Switzerland mo te nekehanga tae noa ki te wa i whakakorehia ai i te mutunga o te tau 1945. I taua wā
Kua mutu te pakanga, i te marama o Mei 1945, ka mahue i te taha ki te hauauru e rua hautoru o Tiamana kua wehea ki nga rohe mahi hoia e wha. I te marama o Hanuere 1946 ka hoki a Herbert Crüger ki Tiamana, kaore i noho ki tana taone o mua o Berlin, engari i te rohe noho a US, i te hauauru. I waenga i te 1946 me te 1948 i mahi ia hei kaitohutohu matua ("Regierungsrat") me nga kawenga e pa ana ki te oranga o te taiohi i te Manatū mo te Mahi me te oranga o te rohe hou o Hesse. I riro tona tūranga anomalous i muri i tū ngā pōtitanga rohe i roto i Hakihea 1946 i roto i nei i mahi kino te Communist Party, me te whai i te reira i hoki ratou i roto i o nga whakaritenga mahi tahi ki te SPD rohe i tae noa ki taua wāhi i roto i te wahi. Neke atu i te kotahi tau i muri mai i mua i te wa i whakahaua ai e te roopu a Crüger ki te whakarere i tana pou kawanatanga, i mahia e ia i te 31 o Hanuere 1948.