Discourse on Foreign Workers

About a week ago, one girl was found dead in Hiroshima (which I wrote about before). This morning a suspect for the murder case was arrested: A Japanese-Peruvian man. This inevitably made me concerned about how this case will influence discourse on foreign workers in Japan. I'm a little afraid that the case may incite further discrimination against foreigners; however, I also hope that it will end isolation of foreigners and facilitate incoporation of them into local communities. As "globalization" continues, it is becoming impossible to ignore the presence of foreign workers in Japan (including sumo wrestlers from abroad?). It's sad that so young a girl was killed, but let's hope that we can make something of it....