So MacDonald:
Logoi 7:17–22 (11:49–51, 13:34–35, [Mk] 14:58) formed a unit that condemned “this generation” of murder and predicted that Jerusalem would not again see Jesus until the residents say “Blessed is the one who comes in the name of the Lord,” that is, until they thus acknowledge him as God’s savior for Israel. Jesus then predicts that he will “destroy this sanctuary that is made with hands and build another that is not made with hands.”
Mark, writing after the fall of Jerusalem, knew of this tradition that expected Jesus himself to return before the destruction of the temple; he warns the disciples not to be taken in by charlatans claiming to be the Messiah during the impending persecution (13:21–22). So the Evangelist distanced Jesus from the prediction of the temple’s fall with three redactions. First, he followed the acclamation “Blessed is the one who comes in the name of the Lord” with Jesus’ entry into the temple but without the prediction that he would destroy it. Second, Jesus did predict the fall of the temple to his disciples in 13:2, but later in the chapter he made it clear that the temple would fall before he returned. Third, Mark put the prediction that Jesus would destroy the temple and build another on the lips of false witnesses at the Sanhedrin and of misinformed mockers at the cross.
(
Two Shipwrecked Gospels, p. 301, my bold)
So the
Risen Jesus would have destroyed and rebuilt the temple. MacDonald agrees with Robert M. Price about the charlatans claiming to be the RISEN Messiah.
While Price thinks that the Christians
really misinterpreted the news about Theudas etc as news about the RISEN Jesus, according to MacDonald, at contrary, Mark invented this misinterpretation Messianists == RISEN Jesus, to make the point that Jesus didn't predict the destruction and reconstruction of the temple.
From this POV, Dennis MacDonald is more mythicist than Robert M. Price.