First; a knowledgeable Jew or Christian knows fully well that slavery is discussed in the Bible. The Jewish law has much to say about slaves and their treatment. This matter is not open to debate. It is a fact every rabbi and a trained pastor is aware of.
Second; just as the Jews and Christians do not discuss slavery in their teachings and sermons, Muslims do not teach much on the subject. Why? The simple reason is that slavery as it existed in ancient times does not exist any more.
To talk of “slavery in Islam” as if the Muslims practice it today is dishonesty. Every country has laws against slavery. However, experts say that slavery has taken a new form today that we shall discuss briefly.