Muslims: explain the whole slave thing?

[use common sense]

Slaves were useful to Mohammad...to rape, to use for work, to sell. He also tempted his lecherous men to kill and die for him by allowing them to rape women they captured and slaves. It kept the whole religion going.

Mohammad made everything up to suit his agenda. Don't look for any wisdom in the Quran, most of it is plagiarized from the Bible and other older myths, while Mo added pedophilia, polygamy and other gruesome things he liked.