John 5:43

I am come in my Father's name, and ye receive me not; if another shall come in his own name, him will ye receive.

The very oneness of Jesus with God was repugnant to men who did not love God, and it is still true. Jesus' life of humility, purity, justice, love, and meekness infuriated and disgusted the proud, arrogant, selfish and lustful rulers of Israel. He was an unbearable contradiction of their life-style, and they hated him to death.

If another shall come in his own name ... such a person would be like themselves, full of pride, arrogance, and conceit; and such a leader would be acceptable to them, as being like them and one of them. Jesus was not thus, but demanded of the noblest of them (as in the case of Nicodemus) an utterly new life.

Scores of pretenders to Messianic glory have arisen since Christ; and, as Hovey noted:

The Jews who were ready to imbrue their hands in the blood of Christ, were just the men to be blinded by the flatteries and taken by the schemes of audacious pretenders to Messianic dignity.[13]

Also, it should be noted that Jesus' prophecy of false Messiahs was literally fulfilled.

This prophecy was fulfilled over and over again. One false Messiah was Theudas; another was Judas of Galilee (Acts 5:36,37). Then came Barkochba (132-135 A.D.) .... There have been several score of others since their day .... All of these presented themselves without proper credentials; they came "in their own name"[14]

Worldly and unspiritual men have no trouble entering into the plans and affections of men of the world.

[13] Alvah Hovey, op. cit., p. 143.

[14] William Hendriksen, op. cit., p. 210.