The international community tends to draw the opposite conclusion. Foreign Secretary William Hague of Britain, for example, said last week that one of the most important lessons to be learned from the Arab Spring was that “legitimate aspirations cannot be ignored and must be addressed.” He added, referring to Israeli-Palestinian talks, “It cannot be in anyone’s interests if the new order of the region is determined at a time of minimum hope in the peace process.”

The Palestinian focus on September stems not only from the fact that the General Assembly holds its annual meeting then. It is also because Prime Minister Salam Fayyad announced in September 2009 that his government would be ready for independent statehood in two years and that Mr. Obama said last September that he expected the framework for an independent Palestinian state to be declared in a year.

Mr. Obama did not indicate what the borders of that state would be, assuming they would be determined through direct negotiations. But with Israeli-Palestinian talks broken off months ago and the Middle East in the process of profound change, many argue that outside pressure is needed.

Germany, France and Britain say negotiations should be based on the 1967 lines with equivalent land swaps, exactly what the Netanyahu government rejects because it says it predetermines the outcome.

“Does the world think it is going to force Israel to declare the 1967 lines and giving up Jerusalem as a basis for negotiation?” asked a top Israeli official who spoke on condition of anonymity. “That will never happen.”

While the Obama administration has referred in the past to the 1967 lines as a basis for talks, it has not decided whether to back the European Union, the United Nations and Russia — the other members of the so-called quartet — in declaring them the starting point, diplomats said. The quartet meets on April 15 in Berlin.

Israel, which has settled hundreds of thousands of Jews inside the West Bank and East Jerusalem, acknowledges that it will have to withdraw from much of the land it now occupies there. But it hopes to hold onto the largest settlement blocs and much of East Jerusalem as well as the border to the east with Jordan and does not want to enter into talks with the other side’s position as the starting point.