An anonymous US official's reported description of Prime Minister Benjamin Netanyahu as a[n expletive meaning] worthless coward, drew a sharp response on Wednesday from the Israeli leader - no stranger to acrimony with the Obama administration.
The American broadside, in an interview in The Atlantic magazine, followed a month of heated exchanges between the Netanyahu government and Washington over settlement-building in Israeli-annexed East Jerusalem, which Palestinians seek as the capital of a future state in the West Bank and Gaza Strip.
"The thing about Bibi is, he's a chicken[expletive]," the unidentified official was quoted as saying, using Netanyahu's nickname and a slang insult certain to redden the ears of the US-educated former commando.
"The good thing about Netanyahu is that he's scared to launch wars," the official said, alluding to past hints of possible Israeli military action against Iran's nuclear program. "The bad thing about him is that he won't do anything to reach an accommodation with the Palestinians or with the Sunni Arab states."
Netanyahu, the official was reported to have said, is interested only in "protecting himself from political defeat ... He's got no guts."
Israeli leaders usually do not respond to comments by unidentified officials. But Netanyahu addressed those remarks directly in opening a memorial ceremony in parliament for an Israeli cabinet minister assassinated by a Palestinian in 2001.
"Our supreme interests, chiefly the security and unity of Jerusalem, are not the main concern of those anonymous officials who attack us and me personally, as the assault on me comes only because I defend the State of Israel," Netanyahu said.
"...Despite all of the attacks I suffer, I will continue to defend our country. I will continue to defend the citizens of Israel," he said.
Such pledges by Netanyahu have resonated among Israeli voters, even amid fears his strained relations with US President Barack Obama could ultimately weaken support from Israel's main diplomatic ally and arms provider.
After Netanyahu's speech, Alistair Baskey, a spokesman for the White House National Security Council, dismissed the purported slur, denying that it reflected how the Obama administration felt about the Israeli leader.
"Certainly that's not the administration's view, and we think such comments are inappropriate and counter-productive."
Some Israeli pundits predict an Israeli election in 2015, two years early, speculation seemingly supported by increasingly vocal challenges to his policies from senior ministers to the left and right of him within the coalition government.
Economy Minister Naftali Bennett, whose ultranationalist Jewish Home party belongs to the coalition but who has had testy relations with Netanyahu, defended him on Wednesday.
"The prime minister of Israel is not a private person. He is the leader of the Jewish state and the entire Jewish people. Cursing the prime minister and calling him names is an insult not just to him but to the millions of Israeli citizens and Jews across the globe," he wrote on Faceboook.
Israeli opposition leader Isaac Herzog sounded a more critical note, telling Channel Two television: "Netanyahu is acting like a political pyromaniac, and he has brought our relations with the United States to an unprecedented low."
In a series of recent speeches widely seen in Israel as setting the stage for a possible poll, Netanyahu has highlighted growing security concerns in the wake of the July-August war with Hamas in Gaza and regional unrest that has brought Islamist militants to Israel's northern border with Syria.
Israel also worries that US-led world powers will agree to what it deems insufficient curbs on the nuclear program of its arch-foe, Iran, in talks with a looming Nov 24 deadline.
Fears of a possible new Palestinian Intifada, or uprising, have been stoked in Israel by now-daily rock-throwing by Palestinians in Jerusalem amid Muslim fears of an end to an Israeli de facto ban on Jewish worship at the al-Aqsa mosque compound in the holy city where Biblical temples once stood.
Netanyahu has pledged to preserve the "status quo" at the site, a commitment Palestinian leaders view with suspicion.
But drawing Palestinian outrage and a State Department accusation that Israel was distancing peace, Netanyahu pledged on Monday to fast-track plans for 1,000 new settler homes in Israeli-annexed East Jerusalem.
Netanyahu described such criticism as being "detached from reality," saying Jews had a right to live anywhere in Jerusalem, regarded by Israel as its united capital - a claim not internationally recognized.
Baskey, the US spokesman, acknowledged longstanding policy differences between Israel and Washington over settlements. "Obviously, despite the extremely close relationship between the US and Israel, we do not agree on every issue," he said.
"For instance we have repeatedly made clear the United States' longstanding view that settlement activity is illegitimate and complicates efforts to achieve a two-state solution." Despite these differences "the US-Israel relationship remains as strong as ever," Baskey added.
Most countries and the World Court deem the settlements Israel has built in areas captured in a 1967 war to be illegal. Israel disputes this, and has settled 500,000 Jews in East Jerusalem and the West Bank, among 2.4 million Palestinians.