Modern Irish scholarship draws a clear distinction between US chattel slavery and any form of white slavery including the Algerine/Barbary form. The distinction is not new; the perspectin of the need to imagine worse horrors than the Algerine slaves experienced may be.

Excerpts from a book at Gutenberg summarize:

"'Indeed, truth and justice demand from me the confession that the Christian slaves among the barbarians of Africa are treated with more humanity than the African slaves among the professing Christians of civilized America; and yet here sensibility bleeds at every pore for the wretches whom fate has doomed to slavery.'

Such testimony would seem to furnish a decisive standard or measure of comparison by which to determine the character of White Slavery in the Barbary States. But there are other considerations and authorities. One of these is the influence of the religion of these barbarians.... the generally kind treatment bestowed by Mohammedans upon slaves. The lash rarely, if ever, lacerates the back of the female; the knife or branding iron is not employed upon any human being to mark him as the property of his fellow-man. Nor is the slave doomed, as in other countries, where the Christian religion is professed, to unconditional and perpetual service, without prospect of redemption. Hope, the last friend of misfortune, may brighten his captivity."

I offer this as information, not argument.....my fone does not facilitate making links and pasting multiple text quotes but the information is out there.