Most Christians today insist that Jesus is God despite the fact that Jesus not only never claimed to be God, but denied being God on several occasions recorded in the Bible and probably others that didn't get recorded. His early followers including his apostles never called Jesus God. Jesus did declare himself Messiah with the prayer he said at the last supper which, according to the rules of the Essenes, could only be spoken by the high priest or the messiah.  The whole Idea that Jesus was God started later, in the Pauline church where Paul tried to make Christianity more acceptable to the Romans who were mostly followers of Mithra, a warrior-like god who was worshiped by many of the Romans and who, while a god himself, was the son of the head god.

    So why are many spiritual teachers so opposed to this belief? Because when people believe that Jesus is God two things happen that shouldn't:

1. They worship Jesus instead of worshiping the true God, the one Jesus himself worshiped, the God of spirit who dwells in Heaven (if you think of Heaven as the highest level of the spiritual worlds).

2. They make little effort to be like Jesus, to do the things he did, and which he taught that we should all do, because they thing an ordinary human cannot do the things God does, so they shouldn't try.

    Jesus didn't descend to the physical plane to be worshiped. He came to teach the truth and to get people to once again worship the true God, the God of spirit, and not the false idols being displayed in the temple and to which hundreds of animals were sacrificed daily (another thing Jesus objected to). He came to correct the false interpretations of the prophecies of the great prophets that came before Him and to get people to take the time to develop their spirits and souls rather than relying on the barbaric concept of killing innocent animals to gain favor with the god of blood-lust who, of course, is not the true God.