Jesus cannot be God and the reason why the Jews didn't accept him is because the Torah (the "Old" Testament) even WARNED the Jews of him. And I will qoute:
"If there should stand up in your midst a prophet or a dreamer of a dream, and he will produce to you a sign or a wonder, and the sign or the wonder comes about, of which he spoke to you, saying, "Let us follow gods of others that you did not know and we shall worship them!" - do not hearken to the words of that prophet or to that dreamer of a dream, for HASHEM, your God, is testing you to know whether you love HASHEM, your God, with all your heart and with all your soul. HASHEM, your God, shall you follow and Him shall you fear; His commandments shall you observe and to His voice shall you hearken; Him shall you serve and to Him shall you cleave. And that prophet and that dreamer of a dream shall be put to death, for he had spoken perversion against HASHEM, your God - Who takes you out of the land of Egypt, and Who redeems you from the house of slavery - to make you stray from the path on which HASHEM, you God, has commanded you to go; and you shall destroy the evil from your midst." (Deuteronomy, Chapter 13, Verse 2-6).
Now Jesus did not follow the laws of the Torah properly, and he even told others to stray from the Torah's laws; for example, when Jesus said, "Let the dead bury the dead." There is a Torah law that a person has an obligation to bury his/her departed relative. And even if there is a dead person on the road, one may not pass the body without giving it the proper honor of burying the body. Jesus did exactly what the Torah passage I quoted above warned of. The laws of the Torah are eternal, as the Torah states, "The entire word that I command you, that shall you observe to do; you shall not add to it and you shall not subtract from it." (Deuteronomy, Chapter 13, Verse 1). "And you shall not subtract from it." God Himself states that He will never change His laws in numerous places. When God promises something, He (being perfect) NEVER goes back on His Word. And the Jewish faith NEVER in it's 3,000 year history (even before Jesus was born) had a concept of a Trinity. "Let us follow the gods of others that you did not know and we shall worship them" includes concepts of God that Moses did not teach us at Mount Sinai, because he taught us the Torah in its ENTIRETY, including the hidden secrets of the Torah. The Trinity was not included. So if Jesus is supposed to be God, or part of Him, or the son of Him, whatever, that contradicts the fundamental doctrines of the Torah ("Old"Testament) which came into existence long before Jesus arrived on the scene.