The Israeli government instructed the IDF to undertake the preparations [for an American military strike on Iran] not because of any intelligence or assessment that Trump will order such a strike, but because senior Israeli officials anticipate “a very sensitive period” ahead of Biden's inauguration on Jan. 20.
So the Israelis believe there is a chance that President Trump might order a sudden strike on Iran on impulse because of his hurt feelings about the U.S. election.