Going into an area where the population is predominantly different, someone will be 'out of place'. Happened to me in LA- I picked up the rental car and needed GPS to reach my cousin's house, but either didn't have my phone charging adapter or didn't want to stop and search for it because I was at the border of Compton and Downey and, as it turns out, people who look similar to me are sometimes dragged out of their cars, beaten/killed and the cars taken. I drove to find a Walgreens-type store and passed on one place because the group hanging out at the entrance didn't look good, at all. I kept going and found a RiteAid, or something and went in. As I was looking for the adapters, a man came over and asked if I needed help finding anything and walked me over to the aisle where they were located. He asked "What brings you to LA?" and I told him, then he said "Well, you don't need to be here". When I arrived and told someone where I had gone, another cousin's husband said "Jesus! You could have been killed!".
OTOH, I was going to meet some friends from out of town one night and neglected to check the fuel gauge, so I ran out at the best possible location- while I was on the freeway. It was 11PM, Winter, cold, dark and like a ghost town- NOBODY was out. Fortunately, I was able to coast up the next offramp and pull over near a corner at a major street. I know the area and as I started walking toward a nearby gas station, a car pulled up and asked where I was going. I told him and he said "Get in and I'll drive you there. He then asked "You know where you are, right?". We got to the gas station, I was able to put a deposit on a gas can and buy some gas, then went back to my car. The only reason I expected it to be there was because it wouldn't have started and in that area, a GM car would have been easy picking. As I was getting out of the car, the guy asked if I had anything for him and I said "Absolutely!", gave him a few bucks and he left. That could have gone very differently, but even in MKE, most violent crime doesn't cross the racial lines although someone could have tried armed robbery.
I have never felt that all people are bad, just some of them but in those two cases, the ones I interacted with reinforced that idea.