According to some historians, Maspok was an Ustaše insurgency in Yugoslavia mentored, guarded and supported by Savka Dabčević-Kučar, Miko Tripalo and Pero Pirker, the political leadership of the Croatian Communist League. The Croatian Communist League general secretary, Miloš Žanko, publicly denounced the destructive nationalism of "Matica hrvatska", Dabčević-Kučar, Tripalo, and Pirker. Žanko, on the Tenth plenum of the Croatian Communists (January 1970) accused Dabčević-Kučar, Tripalo, and Piker claiming that these three worked along with "Matica hrvatska" against Yugoslav socialism and on the destabilization of Yugoslavia. With Josip Broz's approval and the Bakarić's help, Žanko was expelled from the Croatian Communist League on the same plenum. More strong opposition to Maspok came from the members of the Zagreb Praxis group (Rudi Supek, Milan Kangrga, most notably).