European Catholics did the above? Did you read the last part of the article?
In what could be seen as a strong self-criticism of the Roman Catholic Church, whose missionary activities often went hand-in-glove with colonialism, the Pope writes: "We destroyed (their) moral criteria to the point that corruption and a lust for power devoid of scruples have become obvious."
Where do you get that? Secular Humanism is what the rich countries of Europe and America exported to the African-Americans in Africa that gave them the cynicism of a world without God.