Clicking through to read that article[1], it's clear that the categories were created by an algorithm rather than a human, and when reported, were removed without fuss. The way the main article phrases it is highly misleading.
The click-through article also says that while "Jew Haters" was a group that could be selected, it was too small to buy a targetted Facebook ad for by itself. They added a few more 'jew-hating' categories, and a few 'Hitler' categories, and the target demographic was still too small. So they ended up adding the category for a small extremist political party in Germany. At this point, the target demographic was big enough to allow them to buy a $30 ad.
Painting this as "Facebook is facilitating the rise of antisemitism just for a buck" is extraordinarily disingenuous.
[1] https://www.propublica.org/article/facebook-enabled-advertis...