Also, if this isn't a race thing, why are they targeting white girls?
Race is a an identifiyer, culture is the problem.
As I said in another thread, if a string of murders were carried out by people wearing red jumpers, you'd be more cautious around people in red jumpers, but red jumpers are not the cause, just an identifier.
Pakistan has a lot of s**t-hole areas, where the moral standard is still tribal/feudalistic, that the people who live there are brown/white is only relevant as it is with the red jumper killer.
The short of it is, bring in people from "primitive" countries, don't act surprised when they act in this manner and target those outside of their culture.
Multiculturalism only ever works with cultures that are as relatively advanced as each other.