Language is key. Shtokavian dialect is by science Serbian language. Almost 100% of Dalmatia is even now after so many genocides committed on Serbs, area of Shtokavian dialect. Scientific fact.
See, science don`t obey to Vatican`s, Italic, Germanic, British and Franco ideas of necessity to form many new nations from Serbian people, just in order to divide region and control it more easily.
The Croat tribes inhabited The Balkans before The Serbs even got there.
Very nonsensical statement.
You heard Israeli PM Netanyahu, that Jews and Serbs cooperated even at 500 BC at time of Roman Republic.