Jesus is challenged by the his opponents on two points: First, that he is casting out demons in league with Satan and second, demanding a sign from him. Jesus responds to each of these. Revealing that he has come to overpower and bind Satan, to plunder his house. He rebukes this wicked generation for wanting a sign saying that Nineveh and the Queen of the South will rise up and condemn them on the Day of Judgment (two examples of Gentiles who believed with less to go on and yet Israel is rejecting and needing more signs). Instead, Jesus points to the sign of Jonah - one that he will later make more explicit to be a reference to his burial and resurrection.