Its an ethic differnce not a religious one. a Serb living in bosnia is a Serb jsut like a Serb living in germany is a Serb not a german ethnically speaking not citizenship wise or whatever. only religious group in bosnia is a bosniak as they converted to islam much later from the 1500 onwards before that a good majority would of been either Serbs or Croats as thats the two ethnic groups in the region. if you say in bosnia its jsut a religious difference then the difference between all south slavs is religous thats not true.
I think you misunderstood me. The term "ethnicity" is used in many different ways by different people. It is usually a blend of genes, language, culture and religion. Genetics have now demonstrated that there tend to be a link between genes and languages, but it is often not that clear between geographic neighbours.
What Y-DNA shows about people from Bosnia is that overall they tend to be closer to Croats than Serbs, while Serbs are closer to Albanians and Kosovars (indeed Serbia still insist that Kosovo is part of Serbia, and they probably wouldn't if there wasn't a genetic connection, despite the language difference).
Igenea compares the DNA profile of say a dead viking warrior's genes and compare it to a modern person's so that tells whether related or not. how its exactly done i dont know as im not a geneticist so go ask them but its similar as to when they establish whether people have a relation to a dead person like in Canada there was this testing of the Mad trappers genes and it was compared to modern day people who claimed to be descendants jsut like it was done with the russian tsar and they ruled out a potential candidate same probably is done for ethnic groups.
Could you post the link of the page that says that. For our information,
very, very few ancient remains have been tested for Y-DNA. I am not aware of any Viking being tested for Y-DNA so far. Some have been
deduced by testing their descendants, but that's it. Even if we knew for sure about a few Vikings, their lineages could be extinguished, or be too close from other ethnicities (Celtic or Slavic) to be able to tell who descend from them now, after over 1000 years. STR markers have been known to change in a single generation. Imagine after 40 or 50 generations. Actually if you found an identical lineage to yours that is 1000 years old it would almost be certain that you've got the wrong ancestor. Your ancestor would more likely be someone who had similar STR (a distant cousin, perhaps separated by 20 or 50 more generations) that has mutated over time to become yours.
There are
many people who find perfect STR matches on Ysearch or other databases and are not related within historical times (not even from the same part of Europe). These false negatives are due to the relatively small number of STR used and the population boom that Europe experience since the Middle Ages. I have a Belgian cousin who is I1 and has over 500 matches (using 37 markers) all over northern Europe (yet none in Belgium itself because too few Belgians are in the database).
There have been a bit more ancient remains tested for mtDNA, but not enough to be relevant to determine ethnic origins of modern people. MtDNA in Europe is so old that the same subclades can be found all over the continent. I have made a summary of most of the
ancient European DNA tested so far.
Igenea or there haplogroup statitics seemed to be more accurate as Serbs Croats and bosnians had anywhere from 70-85% or so I, R1a, R1b there was much similarity which would make sense. albanians and kosovars are different and the E it seems to latitudically spread from Kosovo again this doesnt make sense because kosovo is now mainly albanian and not Serb so i dont see why the surrounding Serbs would be similar to them as its two completly different ethnicities. an albanian from kosovo is a completly different ethnicity than a Serb in Serbia and a Serb in bosnia.
It does not make sense to you because you think about modern languages. Language can change quite fast. Look at France. 100 years ago, 90% of southern French (Occitan speakers) couldn't speak French at all. Now they all do. In Alsace people have been alternatively German-, then French-, then German-, then French-speakers for the last 500 years. 2000 years ago, Aquitaine was Basque-speaking. Now only two cities on the Spanish border still are, and the rest of Aquitaine doesn't even feel partly Basque, although they are genetically very close to the Basques of Spain. Don't base your assumptions on language.
The Near-Eastern E-J-T haplogroups in the Balkans have been there for over 9,000 years, certainly more than 4,000 years before the arrival of the Indo-Europeans. Nowadays all the languages in the Balkans are Indo-European, even Albanian. Haplogroups are
much older than the language split between Albanian, Serbian, German, Russian, Portuguese or even Hindi. You have to change completely your way of thinking if you want to understand population genetics.