OpenStreetMap is a freely editable map, which sometimes attracts vandalism. We condemn anti-semitism, and the recent defacement around New York. The community fixed this issue within 2 hours, and the vandal has been blocked from further editing. https://blog.openstreetmap.org/2018/08/30/osm-condemns-vandalism/
One thing is the tools to prevent this simply aren't there. The history tool is useless because it is spamed by large bounding boxed edits that go over but may not have any edits in your area. Maybe some things should be off limits for new users. Notifications for edits in your area and locking certain objects prone to vandalism might be a good idea. I would look to Wikipedia for some inspiration.
@GOwin Do you have a link perchance?
That's #vandalism all right, but what's antisemitic about the change? It is just a name occasionally used within the community itself to refer to Brooklyn / New York.
Am I missing something?
If you have other “social” media accounts, try searching people by location using that appellative (I can't do this myself).
The vandal was an idiot and big-time troll, but no indication of racial hatred unless I'm missing something.