No, the race is not the issue, the trauma and the missing knowledge (cultural and technological) made it very hard for the immigrants to secure jobs and create a stable home - there was simply not enough support from the native population for them. If you sit at home, cant get work and only get financial support when you would need therapy and learning materials, then your children will probably not have a stable home. This is also reflected in the crime statistics - higher education radically reduced the chance to become a victim or perpetrate a violent crime.

Murder rates (victims) for 20-24 y.o. people who have 2 immigrants as parents are more 10 times higher than the national average. The statistics for the perpetrators look similar. The race is not very relevant, this would have happened with any population coming from a wartorn country with low to none education - if you aren't literate, there are not many jobs you can do in a first world country; if you don't know how to use a computer, you can pretty much only work stuff like warehouse worker or bouncer.