Gee, Chris. Lets talk.
In South Africa, the rape capital of the world. They just put a tire around your neck and light.
London will just knife you for your pocket change.
Tokyo? Well Japan is a homogeneous culture(no immigrants) and if shamed, will self terminate so crime is really low.
Next question....
London got more dangerous when it got more diverse and one could easily draw a connection between those two things.
We need more self termination here. If you are having a bad day and all you can do is thinking about shooting your peers or making a couple bombs you now can Self Terminate and leave the rest of us alone.