"Whosoever denieth the Son, the same hath not the Father: he that acknowledgeth the Son hath the Father also."
Holy Bible, 1 John 2:23
Whoever denies Jesus Christ: the same denies God, our father in heaven.
Whoever doesn't believe in Jesus Christ, does not believe in him who sent him. Believing in God is believing in EVERYTHING and not just a couple things.
Many people say, "jews still worship the same God as we do"; this is a lie from hell. They have denied Jesus Christ, and so they have denied God. They do not know or believe in God.
The Holy Bible says that we must believe in JESUS CHRIST, to be saved from hell. Jews—followers of judaism—do not believe in Jesus Christ.