Gantz’s Kachol Lavan has only 33 seats. He would need the religious parties and Yisrael Beinteinu as well as the parties of the Israeli Left to form a government.
That means he would need to make compromises to make it happen. He can’t with some of his potential partners’ aversion to sitting with the religious.
Which leaves a coalition with the Likud and secular Zionist parties. Those are his only options.
That or a Likud-led government will be established. The alternative are new elections. A reality that will become clear in the coming weeks.
But how long can this go on? How many elections can they have if they keep returning the same results? If this stays the same, sooner or latter the parties are going to have to make major compromises to form either a ruling majority or a national unity government.
One of the dilemmas that is forcing the present gridlock is the block of Arab parties. Their hardline positions, and the resulting hardline opposition to them, removes a large number of MP's from any potential governing coalition; enough to prevent the remaining Jewish parties from having enough votes to form a majority among themselves without major, and to some unthinkable, compromises. Without their presence it would be easier for the Jewish parties to form a majority. But the Arab parties could not be excluded from the elections without jeopardizing Israel's standing as a democracy. With Israel's present parliamentary system and proportional representation (which I think is the worst form of government) I do not know what the solution could be, except those major compromises among the Jewish parties.