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Since you've admitted you accept discrimination on the basis of race, that makes you, quite literally, a racist. I'm sure you think your racism is justified and righteous and good, but all racists think that. You're not special. You're just racist.

Your recount of history is wild. There were absolutely black slaves, but did you know that there have been millions of white slaves too? Slave markets flourished on the Barbary Coast of North Africa, in what is modern-day Morocco, Algeria, Tunisia, and western Libya, between the 15th and middle of the 19th century. The North African slave markets traded in European slaves which were acquired by Barbary pirates in slave raids on ships and by raids on coastal towns from Italy to Spain, Portugal, France, England, the Netherlands, and as far afield as the Turkish Abductions in Iceland. Men, women, and children were captured to such a devastating extent that vast numbers of sea coast towns were abandoned. According to Robert Davis, between 1 million and 1.25 million Europeans were captured by Barbary pirates and sold as slaves in North Africa and Ottoman Empire between the 15th and 19th centuries.

My own Irish ancestors were also the victims of genocide in the Potato Famine. No one has a hereditary claim on suffering. If you go far enough back in anyone's past you'll find cruelty and subjugation, no matter their skin colour. That you'd try to make it a competition to justify your racism is, I think, quite awful.