Islam's Messenger of Allah not only owned slaves, he traded them as well. The Quran instructs Muslims to regard Muhammad as a fine role model. Thus, is it a surprise that Muslims were heavily involved in owning & trading slaves for centuries?

[That Muhammad owned slaves we know from the Quranic verse, 33:50, giving Muhammad permission to marry his femaie slaves.  Moreover, the hadiths give the names of some of Muhammad's slaves, with Sahih Bukhari mentioning at least two (Anjasha & Mi'dam)]