I am extremely interested in the answer to this but I realize this may not be the right place to ask it and would happily post it elsewhere.
When I mention Black Israelites I mean them or other groups who assert that Blacks are the actual Jews and non-Blacks who claim to be Jews, Ashkenazim I think they have in mind, are descendants of Khazars.
I do not know if deicide (the claim that Jews murdered Christ) is part of the Black Israelite/Black Hebrew doctrine but I know for sure that Farrakhan both accuses Jews of deicide but also calls them "so-called Jews".
So it's very simple: Does anyone who asserts that Jews are in some sense false Jews and yet asserts that Jews are responsible for deicide claim that it was these false Jews, who in every other respect are not really Jews, nonetheless were present in the land where Jesus was crucified to cause his execution?
Do Black Hebrews (and similar groups) claim that their ancestors (in a major lapse I suppose) killed Christ or is this simple question something they don't discuss?