Black males are actually the biggest victims of black male violence. On the day Irina was murdered, several black males were likely killed by other black males as well. Black people are harmed by black violence more than any other race. Whites won't be the ones who will solve black violence, it is something black people will have to solve on their own.
This racial attack should make whites more weary of being in areas with lots of criminal blacks who are the most suceptible to anti-white propaganda since they're looking for someone to blame for their situation. There are good black neigborhoods where this won't happen though. What's important is to have intuition on where you can and can't go. Women especially should have weapons to defend themselves, if in the US, have a pistol to protect yourself, depending on where you live.
In the meantime, whoever you are, avoid shitty areas, regardless of their racial composition, especially at night.