“It’s quite clear to me that we are ushered into a new era of political and legal conflict, and beyond a certain point it could be very hard to contain it,” said Michael Herzog, a former Israeli general and fellow at the Washington Institute for Near East Policy. “They take certain measures, and Israel responds — this could certainly escalate politically, legally, economically and maybe, ultimately, security-wise. It’s a dangerous game.”

President Abbas, having joined the International Criminal Court after months of rebuffing internal pressure to do so, now faces calls from a frustrated public to go further, by halting security coordination with Israel or dissolving the Palestinian Authority. While both steps would be problematic for the Palestinians as well as the Israelis, Palestinian leaders see it as a way to further squeeze Israel. Without the authority, Israel would have to provide services and maintain order across the West Bank without Palestinian security forces, which would likely be both costly and chaotic, and could intensify international frustration with Israel’s occupation.

“I’m a little surprised with the negative American reaction because Palestinians either pursue peaceful legal approaches or pursue violent illegal approaches,” said Ghassan Khatib, vice president of Birzeit University in the West Bank. “But if all the doors are closed, and if the Israelis and the Americans will stop funding, then the P.A. will collapse, and that will play to the hands of the extreme elements in Palestinian society, including Hamas.”

In some ways, the dual Palestinian tracks seem contradictory — how could they continue to make the case for statehood if they collapse the provisional authority the Oslo Accords created two decades ago for state-building? But it is the Palestine Liberation Organization, not the Palestinian Authority, that represents Palestinians on the world stage.

Mr. Ellis, the international-law expert, said that Palestine met the criteria for statehood — permanent population, defined territory, government, and recognition by other states — and that those would not be nullified if the authority disappeared and chaos ensued on the ground. Mustafa Barghouti, one of many Palestinian leaders pressing Mr. Abbas to collapse the authority, envisions “a government in exile” for a “state under occupation.”