True Left

Racial segregation was a pillar of Belgian colonial rule, historians say. Until the late 1950s, the colonial authorities discouraged interracial romance and banned interracial marriage before the Catholic Church.

Many white Belgian men, nevertheless, married black Congolese women according to local customs, producing children sometimes called métis. But in the eyes of Belgium, these children undermined official segregation policies and blemished the white race’s prestige, official documents from that time show.
...
“Children born out of parents of mixed color during colonial times were always considered as a threat to the colonial enterprise, to profits and to the prestige and the domination of the white race,” said Assumani Budagwa, 65, a Belgian engineer and amateur historian who was born in colonial Congo and whose family experienced the separation of mixed-race children.