If Rabbi's are meeting Jesus the Son of God, they would be preaching Jesus the Son of God. They are not doing so, so I conclude that as in the past, orthodox Rabbis are promoting one of their own as being the Messiah.
Jesus said He would return in the same manner He left, i.e., in a cloud over the Mt. of Olives. This is not to say that Jesus has not appeared to people in the interim - He has. But when He does, those individuals proclaim that they have met Jesus the Christ. Jesus appearing to Paul and to Muslims comes to mind. If Jesus reveals Himself to a person - that person will typically preach/testify that they have met Jesus the Messiah. I hear no such testimony from religious Jews who claim they've spoken to a Messiah.
By going up.
"That's one small step for man, one giant leap for mankind."
Psalm 133
1 A Song of Ascents; of David. Behold, how good and how pleasant it is for brethren to dwell together in unity!
2 It is like the precious oil upon the head, coming down upon the beard; even Aaron's beard, that cometh down upon the collar of his garments;
3 Like the dew of Hermon, that cometh down upon the mountains of Zion; for there the LORD commanded the blessing, even life for ever.