Arab slavery was very different to that of white slavery. For starters, it wasn't chattel slavery and children born to slave mothers and free Arab fathers were not enslaved and seen as slaves. They were free citizens. Nor were they looked down upon or seen as tainted.
Also, Arabs enslaved all types of people, black, white, fellow Arabs, Persians you name it. In the early days, slavery wasn't just associated with blackness the way, Americans did. It was associated with defeat.
Furthermore, during the American slave trade, whites used the story of Ham and other biblical scriptures to justify killing and enslaving black people. Whilst iother civilisations such as the Romans, Greeks and Arabs regarded slavery as an outcome of battle defeat and domination, Americans believed that black people were born to be slaves, they looked at them as being inherently inferior, a group bereft of humanity. That type of thinking is pretty unique, considering slavery has existed for millenia.