It is not in the interest of the black poor poor pitiful me victims to acknowledge there were significant numbers of white slaves.
I thought a lot of white slaving went on from Tangier, shipping them off to the ottaman empire as janissaries (and worse).
Gosh, does that mean I have relatives that could claim compensation from Turkey, Libya, Iraq, Egypt et al? Why do the muslims never get flak for their slave trade? Why do they never get flak for doing it now? (as in Mauretania) And its slavery on a racial basis too.
I have no problem with people slamming rich white slaveowning societies on grounds of moral outrage, justice, racism etc etc. What I object to is people playing on our guilt while sweeping the shortcomings of every other culture under the carpet.