The 1935 Nuremberg Laws stripped Jews of their German citizenship and prohibited them from marrying or having sexual relations with “people of German blood”.

A subsequent ruling confirmed that black people (like “gypsies”) were to be regarded as being “of alien blood” and subject to the Nuremberg principles. Very few people of African descent had German citizenship, even if they were born in Germany, but this became irreversible when they were given passports that designated them as “stateless negroes”.

…It was the Nazi fear of “racial pollution” that led to the most common trauma suffered by black Germans: the break-up of families. “Mixed” couples were harassed into separating. When others applied for marriage licences, or when a woman was known to be pregnant or had a baby, the black partner became a target for involuntary sterilisation.

In a secret action in 1937, some 400 of the Rhineland children were forcibly sterilised.

What happened to black Germans under the Nazis | The Independent

hmmm