(Speaking on behalf of the Jubu's, the Jewish Buddhists: http://en.wikipedia.org/wiki/Jubus )
The Messiah is within, it takes time to cultivate, that's why they wait.
People are easily influenced by illusions, signs, experiences, and fantasies that are a socially acceptable means to acquire more attention of potential friends.
And they base their Logic of Truth off of such BS.
Finding Truth:
In the Kalama Sutra, Buddha says.
Do not believe in anything simply because you have heard it..
Do not believe in anything simply because it is spoken and rumored by many.
Do not believe in anything simply because it is found written in your religious books.
Do not believe in anything merely on the authority of your teachers and elders.
Do not believe in traditions because they have been handed down for many generations.
But after observation and analysis, when you find that anything agrees with reason and is conducive to the good and benefit of one and all, then accept it and live up to it.