During the Muslim conquests and the reign of the Caliphates, the people that were conquered were treated in terrible manner in general. The Caliphs wanted their religion spread among all the people they ruled over, which led to forcing the people to accept the Islam against their will, the ones that opposed were usually murdered and enslaved, there was an Arabic assimilation going on, and multiple systematic genocides. The women that were not Muslim were taken as slaves in the harems as the holy book was suggesting exactly that. All the people that were not willing to accept the faith were tortured, harassed, enslaved, murdered, didn't had any rights, and were considered as beings on the same level as the pigs, filthy creatures that do not deserve to live. The biggest damage was done toward the Christian and Jewish communities.
