""What makes these gangs different, is that they target non Muslims.""

You just don't get it do you Ake?

They target what they find in the street. It happens that Asian (N.B. Asian, not Muslim, since many Muslims are either white or black) girls are not prominent in that grouping.

White Muslims would include some Croatian, Afghan, Iranian, Turkish etc.
Black Muslims would include not only many of African origin, but also many black Americans.

It is virtually impossible to target non Muslim girls, as one cannot know who they are, unless they are in Muslim dress.

Incidentally, the crime of grooming is dependent upon provable sexual intent. Otherwise they are just offering a lift, or a drink, or whatever. It becomes trafficking when (and not until) the victim is passed on to others for sex.

Don T.