The social network allowed advertisers to buy ads specifically targeting "Jew haters" and people who were "interested in" other anti-Semitic topics, according to a new report from ProPublica.

The publication found that Facebook's advertising portal contained a number of anti-Semitic categories ad-buyers could use to help target their ads on Facebook. These categories, which have since been removed, included "Jew haters," "How to burn Jews,” and “History of ‘why jews ruin the world," and "Hitler did nothing wrong."

These repugnant "categories" were apparently created automatically because a small number of Facebook users listed them on their profiles under "interests" or "fields of study." Facebook's advertising tools automatically generate ad categories based on these fields.