The “Black Hebrew Israelites†who harassed
the Covington Catholic HS students at the March for Life rally in DC
are preaching the same doctrine that motivated the guy
who murdered Martin Luther King's mother in 1974.
The doctrine teaches that the Blacks are actually the original Jews,
and that all other Jews are imposters.
They also teach that Christianity
is a doctrine the (imposter) Jews invented to oppress the Blacks,
and that Black Christian ministers are traitors to their race.
Marcus Wayne Chenalt, who killed MLK's mother during a worship service
at the Kings' home congregation in Atlanta
was an avid follower of that doctrine.
Chenault was indeed a mentally unstable person,
who latched on to the Black Israel doctrine
and took it upon himself to "cleanse" the Blacks of their "oppressors."
More info at:
https://www.nytimes.com/1974/07/04/archives/a-spiritual-teacher-asserts-chenault-was-an-avid-student-little.html