Her passion was offing non-whites

Angela Franks critically reviews a new biography of Margaret Sanger subtitled "A Life of Passion" by Jean H. Baker, which tries very hard to downplay Sanger's attachment to the eugenics movement, just as some try to downplay Jefferson's attachment to his slaves. Here's an excerpt explaining why you shouldn't believe she wasn't a racist:

The book’s treatment of the population-control movement reveals a similar failure to understand the history of eugenics. Baker writes that by the late 1920s, Sanger “had determined that population experts, like eugenicists, were emerging as an expanding pool of potential supporters.” In fact, population experts were eugenicists, plain and simple. Beginning with the first to use the term “eugenics,” Francis Galton (1822–1911), down through the eugenicists with whom Sanger worked in the 1920s through the 1960s, all early population “experts” were eugenicists. The discipline of demography was shot through with eugenic assumptions. As feminist and Marxist historian Linda Gordon observed, “The eugenics people slid into the population control movement gracefully, naturally, imperceptibly … There was nothing to separate the two movements because there was no tension between their two sorts of goals.”

Why were the two movements so closely aligned? The key can be found in a popular slogan of the eugenics/population-control crowd: “Quality, not quantity.” Eugenicists believed that, in order to improve the race, fewer people (only the so-called “fit”) should reproduce. In its 1927 Buck v. Bell decision, written by Oliver Wendell Holmes, Jr., the Supreme Court ruled that compulsory sterilization of the “unfit” was allowable under the Constitution, enabling American states to sterilize, on a far greater scale, those citizens deemed unfit, without their consent and sometimes even without their knowledge. (In the end, a majority of states allowed for involuntary sterilization, leading to over 60,000 sterilizations by 1967.) Between birth control and involuntary sterilization, the eugenics movement had a plan for dealing with the “unfit” in America.

But what to do about the great mass of people outside her borders? As Sanger confided in a letter to Clarence Gamble in 1940, India was “a bottomless sink … They need birth control on a large scale and it should be continually prodded into the national consciousness daily, hourly, for at least five years.” The Rockefeller family, deeply immersed in eugenics, financially supported the earliest eugenic population-control organizations, such as the Population Council. This was done quietly, however; as Frances Hand Ferguson, a former president of Planned Parenthood in America, observed, “Certainly the Rockefellers didn’t want to be known as a family who was telling little brown Indians not to have babies.” Population control was a gussied-up eugenics—with a passport.