PBKs interpret it as: they are pandav, BKs are kaurav and the outside world is yadav.
But i feel that all 3 groups are within the Brahmin family only (which will be realised in the end).
....i can try to further filter your views....all these 3 groups are not only within Brahmin family but it is within the souls who had acquired ADVANCE KNOWLEDGE....SEED SOULS
i.e Beej atmayein that is PBK's themselves get categorised to these PANDAV's,KAURAV's AND YADAV's.....this is the first process than in second process they are supported by ROOT SOULS
i.e adharmurth and finally they get the support of outside world.....wit heach process more further filtering takes place and the pandav population goes on decreasing in each process....Mahabhari Mahabharat Grih Yudh
...starts from seed world which takes a larger form of root worls and then finally this war engulfs the whole tree.....from core point of view to broad point of view you can get the whole detail from this....
Panda baap ke aulaad-------->PANDAV
Arya Samaj ke aulaad-------->KAURAV
Anya Dharm ke aulaad------->YADAV
....now you tell me what is your view....i am asking you only for the reason that you are not clearly coming out with proof that who is PANDA BAAP and trying to get the proof of PANDAV,KAURAV and YADAV.....first try to research for PANDA then the whole mystery of your question's will get end.....or might not????