However, the U.S. decision to move its embassy from Tel Aviv to Jerusalem, the eastern part of which Palestinians consider their capital, lowered the odds of Palestinians trusting the United States as a mediator between them and the Israelis, something they have expressed through demonstrations during the time of the workshop, but Kushner thinks otherwise.
While Kushner indicated that outstanding political "issues" would be dealt with in a subsequent U.S. proposal, which will certainly not be released before the Israeli elections called by Netanyahu for September after his failure to form a government.
"While I accept that peace is essential, back then it was the hope of peace that got them actually excited and moving", Al Sheikh said.
And that participants all said that "the shift in the Palestinian economy is possible".
"In continuation of Oman's support for the Palestinian people, the Sultanate of Oman has made a decision to open a diplomatic mission at the level of embassy in the State of Palestine", the foreign ministry said on Twitter. It is totally divorced from reality.
With Prime Minister Benjamin Netanyahu facing proliferating challengers in a new election due in September, and beset by corruption scandals, the hazier-than-ever peacemaking horizon with the Palestinians drew scant discussion in Israeli media.
The chief of Islamist group Hamas, Ismail Haniyeh, criticised the plan as a ruse against the Palestinian people.
"This money must not come at the expense of our enduring rights, or at the expense of Jerusalem or the right of return or at the expense of sovereignty and resistance".
He said a peace deal would happen when both sides are ready to say "yes".
Cohen, a member of Netanyahu's security cabinet, said Arab delegates saw Bahrain as a chance to close ranks with Israel on bilateral commerce and in the face of a common adversary.
The Lebanese government and parliament both oppose the USA plan, Prime Minister Saad al-Hariri said on Wednesday.
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Washington hopes wealthy Gulf states will bankroll the plan, which expects donor nations and investors to contribute $50 billion to Palestinian and neighbouring Arab state economies.
"Stability and security is key to investment in every country where we go", said Selim Bora, the president of the Turkish investment firm Summa.
The plan acknowledges that its success hinges on the completion of a long-elusive Israeli-Palestinian peace deal.
Israel also refused to send a delegation to the event.
Kushner said on Monday the plan would not adhere to the Arab initiative.
Neither the Israeli nor Palestinian governments are attending the event, which the Palestinians and many other Arabs dismiss as pointless without a political solution.
Breaking with the global consensus, Trump in 2017 recognised Jerusalem as Israel's capital, infuriating the Palestinians and other Arabs. "There will be a peace that has a political component and an economic component, but the economy can help the politics and the politics, of course, is necessary for the economy to flourish".
International Monetary Fund managing director, Christine Lagarde, said generating economic growth in conflict-riven countries can be a struggle.
The plan seeks to double the gross domestic product (GDP) of Palestinians, create approximately one million jobs for Palestinians, reduce unemployment in the West Bank and Gaza from 30 percent to single digits, and halve the percentage of poverty among the Palestinian population.
"Gaza right now is feeling a lot of pain because of bad leadership and the sanctions that have been imposed on them because of it", Kushner said.
The diplomatic mission will be located in the West Bank city of Ramallah.
A Palestinian businessman attending expressed disappointment that Kushner had not done more to address the political situation.
Bahrain's foreign minister has said Israel is part of the region's heritage and the Jewish people have "a place amongst us" in a rare interview of an Arab official by an Israeli journalist.