Most of the bible is interpreted as universal, but when you read it is all about for tell "Juda", etc... It's basically about the "jews" as defined in the bible. What if you are not that? Then why should any of the old testament apply to you? Unless you can trace your ancestry back there.
Then Jesus says "love your enemies", for loving only your friends is that of the "gentiles." So either you have to accept that your particular tribe you belong to are the real Isrealites and the others are not, or you have to accept you are indeed one of the Gentiles. Jesus opens salvation for the "gentiles" which is good news for the rest of us, I guess.