Croats (and Serbs) remember many cruel and demeaning acts perpetrated by the Muslims, who acted as the protected privileged caste. These include many pogroms and murders of Franciscans, as well as the sale of Croats into slavery.
Up until the 19th century, historical sources claim that Bosniaks of all three faiths (Catholics, Orthodox and Muslims) live in Bosnia.
The Ottoman invasion was unleashed towards Bosnia, but Bosnian aristocrats at the end of the 14th and the beginning of the 15th century, such as Hrvoje Vukcic Hrvatinic and Stjepan Kosaca, were almost solely preoccupied with their parochial power games and preservation of influence spheres.
Since there were no adherents of the Orthodox faith in Bosnia before the arrival of the Ottomans, it can be concluded that the direct descendants of the indigenous population are today's Croats and Bosniaks-Muslims. One of the facts that proves this is the use of the "ikavica" sub-dialect by both national groups.
Medieval Bosnia shared many characteristics with other South-Slavic states of the period. That political domain (not a state!) was established as a military commonwealth and functioned as a patriarchal family.