Actually Islamic blacks are not the threat as such, because they tend to wear obvious signs and keep themselves separate from white, Kafir society. The problem is that the authorities don't have the sufficient will-power to deal with these undesirables, who in themselves have little power.
The secular blacks who parade about with their suits and blonde secretaries are a threat from the point of white people, however you want to look at it. Call it racist if you like, but I am not deceived as to the thing which exists between white women and black men. If white women had their way, every white guy would be out on his ear and importing a mail-order bride from the Orient while the white girls whoop it up with their sleek-skinned, bald, Zulu paramours.