Classe was influential in persuading the Belgian colonial administration to favor the Tutsis as a ruling caste in the country over the Hutu majority.

As a presumed expert on the country, his 1916 paper on the political organization had great influence on the thinking of the Belgian administration, which came to support the leadership position of the Tutsis.

[6] In 1920, when the territories of German East Africa were being divided by the victors of World War I, there was debate between the Belgians and British over the boundaries of Rwanda.

His work, full of praise for the unique African country with its Tutsi aristocracy, was submitted as a memorandum to the British in March 1922.

In Europe his superiors became fully confident in his capability, and his assistance in the question of the eastern boundaries gained him the support of the Belgian colonial ministry.

In 1930 he again said that suppressing the Tutsi caste would cause great damage, leading to anarchy and viciously anti-European communism.

[12] Classe played an important role in the deposition of Yuhi V Musinga in 1931 and in the choice of his successor, Mutara III Rudahigwa, who was a Catholic catechist at the time.

That year Classe baptized King Mutara III Rudahigwa in a ceremony attended by the chiefs.