Feral black humans, to be precise.
I think it's getting worse, which is why white people acquiring CCW license are on the rise.
It's probably good at this point to re-emphasize John Derbyshire's Rules:
(10) Thus, while always attentive to the particular qualities of individuals, on the many occasions where you have nothing to guide you but knowledge of those mean differences, use statistical common sense:
(10a) Avoid concentrations of blacks not all known to you personally.
(10b) Stay out of heavily black neighborhoods.
(10c) If planning a trip to a beach or amusement park at some date, find out whether it is likely to be swamped with blacks on that date (neglect of that one got me the closest I have ever gotten to death by gunshot).
(10d) Do not attend events likely to draw a lot of blacks.
(10e) If you are at some public event at which the number of blacks suddenly swells, leave as quickly as possible.
(10f) Do not settle in a district or municipality run by black politicians.
(10g) Before voting for a black politician, scrutinize his/her character much more carefully than you would a white.
(10h) Do not act the Good Samaritan to blacks in apparent distress, e.g., on the highway.
(10i) If accosted by a strange black in the street, smile and say something polite but keep moving.
Want to call me a racist? Fine, I'm a racist. If you don't heed these principles, though, don't blame me when you are victimized.