I think American blacks influenced by Islam are more likely to do things like the DC sniper pair did. That is, things that kill the infidel but generally do not get them killed in the process. I don’t think AQ is going to have much luck luring them into suicide bombings.
It reminds me of a great joke by the late Richard Pryor, mocking all the white horror movies. There’s a haunted house, and ghastly things keep happening, but the white family does not leave because “This is our HOUSE!” The way he delivered the punchline was so funny I can’t do it justice but something like “A black family? Would get OUT of the DAM* HOUSE!” It would be a very short horror movie.