 Nyorai kupfuurira kweiyi ndima - Pakati pa1939 na1942, Jasper akakwanisa kuita tsvakurudzo yenhau pa Kufanana navamwe vezvematongerwe enyika vapukunyuka veRepublic yeWeimar, nguva yake yakapfuura inorwisana neNazi yakamuchengeta ari pasi pechiratidzo chevakuru vakuru. Kuedza kuuraya Hitler kwakakundikana kwakaitika musi wa20 July 1944, iyo yakateverwa nokusungwa kwevanhu vakawanda. Jasper akasungwazve musi wa22 August 1944, achinyepedzera zvainzi Aktion Gitter. 