I understand what a community is. We live in a global community, for several reasons, according to history, science, psychology, sociology, etc.. AND Jewish Scripture.
There is a Covenant concerning God and whom? The Law and whom? Everyone and everything, perhaps? We are referring to the Most High God? Creator, and Sustainer of all things, eternally?
You are able to acknowledge 'Jews' who separate wholly from religion, and God, and still mention a Covenant? And you don't understand that God's Covenant is all there is? Neither do many Jews, Christians, or Muslims. It is a very hard thing to understand, and I don't expect you to.
Jews will continue to expect Elijah; they don't have a full understanding of the importance in turning their own hearts to their own children. Christians will continue to expect Jesus; they have very little understanding of the causes to poverty, or terrorism. Muslims will continue to expect everything, from Muhammed, and Jesus, and Elijah. How could you understand? As blind as Isaiah was, even he understood that the servants of God are blind, and the messengers deaf.