You should take a look for yourself.
95% of Germans during the Nazi rule were Evangelical Christians.
In South Africa, the Dutch Reformed Church was how the apartheid regime was organized.
The Germans were also 100% of european decent, that's a higher percentage than were Christians, so maybe that's why. Or 96% of them came from 2 parent households, so maybe that's why, or 100% of them said it was cold in the winter, so maybe that's why. Correlation doesn't equal causation. Also, as the evidence mounts, it keeps looking more and more like that narrative keeps falling apart. Seems like the scale of that event may have been massively exaggerated, including the number of people who participated in anything related to a genocide.
As far as Apartheid, they were doing what was best for everyone. You may not be comfortable with it, but it doesn't change the facts. Before European colonization, it was mud huts and constant murder with sharp sticks. Famine, war, starvation, mass rapes, disease, etc. After apartheid ended, it quickly went right back to what it was. Those are facts, no matter how they make you feel.