That was something that I read defending Sanger - that we’d entirely flipped the meaning of that paragraph. I had only seen the short version and was wondering about the complete context, which, in this case, doesn’t make it clearer.
It could still be an intent to do away with blacks through abortion and birth control.
After WWI, she said couples should have to be genetically ranked and licensed to have children. After WWII she said there should be a law prohibiting childbearing for 10 years --- like losing 2 generations (WWI and WWII) wasn't enough.
To her credit she did not campaign for abortion. She thought segregation and sterilization were the preferred ways to control the 'reckless breeders'.
Wikipedia removed the racist aspects of her bio. That doesn't surprise you, does it?