He's saying what he is with good reason.
Jesus can't come back to Israel right after Sharon dies if it is soon.The tribulation must happen first before the return of the true Jesus.

And the way the rabbi talked about the messiah coming in other sources makes it sound like it's somebody already living in Israel.Jesus is in heaven on the right hand of the Father,not on earth.So logically I conclude that the Rabbi's messiah will be the antichrist because his claims clash with scripture.

So I think he either lied,this was a fabricated story altogether,or messiah he is expecting will be the man of sin.