US Secretary of State John Kerry warned Saturday that key Israeli policies were "imperilling" the viability of a two-state solution and pushing the Palestinian Authority toward collapse.
Speaking at the Saban Forum in Washington D.C., Kerry said that there were "valid questions as to how long the Palestinian Authority will remain if the current situation continues," in some of his strongest comments to date.
"The current path is not leading to a more peaceful future. I am concerned that if a significant effort is not made to change the current dynamic, it will only bring more violence."
He reiterated his condemnation of Palestinian acts of violence, but stressed that key Israeli policies -- including control over Area C, settlement activity, and home demolitions -- were pushing the region away from peace.
"President Abbas spoke more despairingly than I have ever heard him about the sense of hopelessness the Palestinian people feel," Kerry said, referring to a meeting the two held during a visit to the region at the end of last month.
While he acknowledged that Israeli Prime Minister Benjamin Netanyahu had stated his commitment to a two-state solution, he said it was "important that that not become a slogan, not become a throwaway phrase -- that it becomes a policy."
He expressed alarm at recent reports that senior Israeli officials had agreed it was not in Israel's interests to maintain the PA, and condemned Israeli government ministers for outright opposition to the creation of a Palestinian state.
He said the PA's 30,000 security forces had played a "key role in preventing the situation from spiralling out of control" in the occupied West Bank -- including over the course of three devastating wars in Gaza.
"Without the PA security forces, the IDF could be forced to deploy tens of thousands of soldiers to the West Bank -- indefinitely -- to fill the void," he said.
"Are Israelis prepared for the consequences this would have for their children and grandchildren who serve in the IDF when the inevitable friction leads to confrontation and violence?"
He said it would cost Israel billions of dollars to control the West Bank, while they would run the risk of allowing religious extremism to fill the vacuum of "chaos, lawlessness, and desperation" left by the PA.
"Without the PA, Israel would also shoulder the responsibility for providing basic services in the West Bank, including for maintaining schools, hospitals, and law and order," he said.
In exasperation, he asked: "If there is a risk the the PA could collapse, and it is in Israel's interests for it to in fact survive, should more therefore not be done to help sustain it?"
The US secretary of state also raised key questions about the nature of a one-state solution, in comments that some Palestinians will see as reflecting a reality that already exists.
"Would millions of Palestinians be given the basic rights of Israeli citizens, including the right to vote, or would they be relegated to a permanent underclass?" Kerry asked.
"Would the Israelis and Palestinians living together in such close quarters have segregated roads and transport systems, with different laws applying in the Palestinian enclaves? Would anyone really believe they were being treated equally?"
He said: "The one-state solution is no solution at all for a secure Jewish, democratic Israel living in peace."
However, he went on to say that "current trends, including violence, settlement activity, demolitions are imperilling the viability of a two-state solution."
He noted that Area C, territory that falls under full Israeli control and constitutes more than 60 percent of the occupied West Bank, "is effectively restricted for any Palestinian development."
He said that in 2014, his office was aware of only a single building permit being granted by the Israelis authorities to Palestinians living in Area C.
Meanwhile, he said that Israel was continuing to legalise settlement outposts, while "the settlement population has increased by tens of thousands over just the last five years."
He said: "The continued settlement growth raises honest questions about Israel's longterm intentions, and will only make separating from the Palestinians much more difficult."
Kerry urged Israel to look toward the 2002 Arab Peace Initiative, which calls for an Israeli withdrawal from the Palestinian territories in exchange for full normalisation of ties with the Arab world.
He also called for them to strengthen the PA, saying that increasing the PA's power would serve toward peace for both Palestinians and Israelis.
Kerry reportedly left the region at the end of last month disappointed to find Israel unwilling to compromise in the occupied West Bank. The last peace talks between Israel and the Palestinians collapsed in April last year.