If you've ever created a facebook ad, you know there is a feature that allows you to target specific groups. I didn't realize that you could create the groups to be very specific--I usually only targeted by age and location. Apparently, you could even create a group yourself.
Someone created a group called "Jew Haters" and was directing ads at them for White Supremicist rallies.
Needless to say, Facebook is embarrassed by this. Not only didn't they do anything about it. They had no idea it was happening.
Or so says their COO, Sheryl Sandberg. I have a tendency to believe her. After all, she is Jewish herself.