Women torn apart- There is no authentic report whether Holy Prophet (PBUH) ordered her killing specifically. The manner she was killed was not ordained by the Prophet (PBUH) but was carried on by the people who had undergone the terror practiced by her men. It was a reaction by such people; nevertheless it goes against the mannerism taught by Islam.
Enslaving- Muhammad pbuh companion Abu Bakr (ra) freed a slave called Bilal (as) and bilal was the first person to read the Azaan.