i agree that Jesus points to God as being One.
and that Jesus makes a distinction between Himself, and His Father, even as He tells us that He and His Father are One. One in purpose, One in understanding, and One in divinity. he who knows Jesus, knows the Father, and he who hs seen Jesus, has seen the Father. all power on heaven and earth has been give to the Son, including a power nomally reserved for God, the authority to forgive sins. all these things come from Jesus' own mouth in the Gospels, guys.
Jesus prays to His Father, honours Him, worships Him, and returns to Him. He is clear that for us humans, the only way to come to God in a personal, real, fulillng way is through the Son He sent. that Jesus is the One whom God wants us to know personally, and live for.
can a trinitarian Christian do this? absolutely. can a non-trinitarian Christian do this? absolutely, too. what matters is Christ. i've met many born-again trinitarians, and some born-again non-trinitarians, too. in seeking to "return" to a more clearly Judaic / unitarian theology, i feel that many religious bodies which profess Jesus as somehow central really alienate themselves from other Christians. it becomes more about a specific church / culture of worship than about unity in Christ. "Messianic" and "Christian" mean the same thing.