For one brief moment during Yair Lapid’s news conference Dec. 3, the newly fired finance minister shifted tone slightly as he read the carefully crafted text from his teleprompter. It happened when one of the journalists asked him whether, given all the harsh criticism he hurled at Prime Minister Benjamin (Bibi) Netanyahu during his speech, he was also prepared to make a commitment not to join a Netanyahu government after the elections.

“Look at me,” Lapid said directly to a reporter. “Benjamin Netanyahu will not be prime minister after these elections. He made a mistake, and the cost of that mistake is that he will no longer be prime minister.” As he uttered this momentous prediction, he suddenly sounded passionate and excited.

Lapid has a reputation as a courteous politician. Even in the tensest moments, he always made a point of showing respect for Netanyahu. It seems, however, that the orchestrated humiliation that the prime minister put him through this week — culminating in Lapid suddenly being fired from the government — whetted his appetite for vengeance.

The question is how far Lapid is willing to go with an “Anyone but Bibi” tactic. Would he be willing to sit in a coalition with the ultra-Orthodox parties, whom he disqualified as coalition partners after the last elections? At this news conference, Lapid avoided rejecting the ultra-Orthodox categorically, leaving the door open.