 He also argued against unfair exchange rates imposed on Croatia after 1945 and condemning show trials against people labeled as collaborationists.Hebrang wasn't a serious threat to Serbian interests, since he was demoted several times and in 1948 he was put under house arrest, and later killed.Croatian nationalism did not disappear but remained dormant until the late 1960s to early 1970s with the outbreak of the Croatian Spring movement calling for a decentralized Yugoslavia and greater autonomy for Croatia and the other republics from federal government control.