Abdur, we have lots of ethnic problems in the Apostolic Churches. I'm not surprised if Catholicism and Orhodoxy are not welcomed by Bosniac people, specially because Catholicism comes from the Croatians and Orthodoxy from the Serbs, you know what are we talking about.
The identity thing is important, Bosniacs are now "muslim", but it is thought that their separate identity existed even before islam arrived, as most of them were bogomiles (members of a dualistic heretical sect). It is possible that they were a separate groups because the bogomiles in Bulgaria, for example, converted to Roman Catholicism, and not to Islam, and most Roman Catholic people from Bulgaria, Mecedonia, and some parts of Greece may have been connected to the Pomaks or to the muslim slavs of the Balkan.
However it is impossible to deny that the Apostolic Churches have been weak in their recent missionary jobs. Some would say that not the Latin Church but it is impossible to ignore that the versions that the modern Catholic missions are spreading among non-christians, like charismatism, are far from the original teachings of the Latin Church.
About Orthodox Churches, the ethnic problem is the main obstacle, for example, in Turkey there's a strong needing of finding Jesus Christ among Turks, but the Orthodox Church doesn't do a good job with the Turkish people (despite the fact that in most parishes, the liturgy is celebrated in Turkish) because of those infamous agreements with the government, and its "foreign status"