You and I are in 100% agreement on the attitude, but I think the details are even more profound. IIRC, it's:
black slaves taken to colonial American states: 300K to 400K
white slaves from Europe taken to African states: 1.0 to 1.2 million (all of them kidnapped from Africans, not fellow Europeans)
black slaves taken to Latin America: 5.0 to 5.5 million
Jews killed in the Holocaust: 6 million
black slaves sold to Asia: 10 - 12 million.
babies aborted in the U.S. in the past half century: 67 million
Yet we're supposed to believe the black slaves in English speaking America was some kind of unprecedented atrocity that hasn't ever been eclipsed.
Did you really mean to write "from," and not "by?"
Regards,