They were barbaric hordes that followed a model of enslaving and looting and never created anything. The only multiculturalism was towards jews, who were invited by the sultan from Spain to Thessaloniki to replace the local (Greek Christian) population and make a career as slave traders and moneylenders. Non-muslims (with the exception of jews) were living as slaves and suffered. Religion and ethnicity coincided; to "become a turk" meant to become a muslim and many did either for profit or at threat of torture and execution.