Hebrews 7:27
Who needeth not daily, as those high priests, to offer up sacrifice, first for his own sins, and then for the people's: for this he did once, when he offered up himself.
The Christian belief in Christ's sufficient sacrifice, has nothing to do with whether many Jews want to build their church building again. I think it's really likely that they want to as much as any American church member whose building has ever burned down.
So, I think they'll do it. I makes simple common sense.