Since vast majority of black slaves (sold out of Africa by Arabs) didn't go to US, why is the US the main target?

Ask you tenured socialist teacher about this.

Since vast majority of black slaves (sold out of Africa by Arabs) didn't go to US, why is the US the main target? pic.twitter.com/fUY8pJ1Pit

— Peter McLoughlin (@pmclauth) April 25, 2017