Several protesters interrupted the start of the confirmation hearing for David Friedman, President Trump's pick for ambassador to Israel. The Senate Foreign Relations Committee heard testimony from Friedman Feb. 16. (Reuters)

President Trump's choice to be the U.S. ambassador to Israel sought Thursday to assure skeptical senators that he can be fair-minded despite previous public statements doubting a Palestinian state and supporting Jewish home-building in the West Bank.

“Some of the inflammatory language I used during the highly charged presidential campaign … has come in for criticism, and rightfully so,” said New York lawyer and staunch Trump supporter David M. Friedman.

“I regret the use of such language, and I want to assure you that I understand the important difference between a political contest and a diplomatic mission,” Friedman told the Senate Foreign Relations Committee. “From my perspective, the inflammatory rhetoric used during the election campaign is entirely over, and you should expect my comments to be respectful from now on.”

Asked about insults he lobbed at then-President Barack Obama, Sen. Charles E. Schumer (D-N.Y.) and others about support for the Iran nuclear deal that the Israeli government opposed, Friedman said he regrets them.

“There is no excuse. If you want me to rationalize it or justify it, I cannot,” Friedman said. “These were hurtful words, and I deeply regret them. They are not reflective of my nature or my character.”

A pro-Palestinian demonstrator interrupted Friedman before he had finished his first sentence, and another followed after the nominee had introduced his family behind him.

“We are there, we are there right now, and we will always be there!” the man shouted. “Palestinians will always be Palestine!”

Friedman was asked to explain whether he supports an independent Palestinian state as part of a peace settlement after decades of conflict between Israel and the Palestinians. On Wednesday, Trump backed away from the presumption of two states as the goal of peace, saying he would back whatever structure the two parties decide is best.

Friedman had written that the goal of a sovereign Palestine is a “damaging anachronism,” but he suggested Thursday that the two-state idea could be viable if sought by both sides.

“I have expressed my skepticism about the two-state solution solely on the basis of what I've perceived as an unwillingness on the part of the Palestinians to renounce terror and accept Israel as a Jewish state,” he said. “I think that, in my view, is a foundational problem, but I think it could be remedied, and I hope it is.”

He “would be delighted” to see a peace agreement on terms acceptable to both sides, he said. Later, he said he does not support Israeli annexation of the West Bank, which would preclude a separate Palestine.

He described his philanthropic support of an Israeli settlement in the West Bank as apolitical. A U.S. supporters' group he heads has given money for education facilities, he said.

Asked about Trump's statement that new settlements could hamper peace efforts, he said he agrees.

“It makes sense to tread very carefully in that area,” Friedman said.

Other senators noted the opposition to Friedman by five past ambassadors, a group that served Democratic and Republican presidents. Sen. Jeanne Shaheen (D-N.H.) described the anguished reaction to Friedman from a Holocaust descendant, leaving Friedman looking stricken.

Over and over, he said he retracts or regrets remarks and writings that place him at the extreme right of American Jewish thought — and often to the political right of Israeli Prime Minister Benjamin Netanyahu.

“You’re here today having to recant every single strongly held belief that you’ve expressed, almost,” remarked the committee's chairman, Sen. Bob Corker (R-Tenn.). “This is fairly extraordinary.”

Why, Corker asked, would Friedman go through that exercise?

Friedman answered slowly. The job of ambassador, he said, would be “the fulfillment of a life’s dream, of a life’s work, of a life of study of the people, the culture, the politics of Israeli society,” he said.

“I believe that based upon my relationship with the country and its people, I can be helpful. I can do good,” Friedman said. “I believe that based on my relationship with the president, I can help him get to the right place — as he said colloquially — to make a deal.

“My views are my views,” he said. “Some of them — I recant, certainly, the rhetoric, the inflammation, the hurt that I’ve caused. I need to do a much better job going forward.”

The hearing began with an acknowledgment from all sides that it was going to be contentious. Corker began by warning would-be protesters that he couldn’t keep them from being arrested.

Former senator Joseph I. Lieberman (I-Conn.) helped introduce Friedman and urged colleagues troubled by Friedman's past public positions to ask the nominee about them but to keep an open mind.

Sen. Benjamin L. Cardin (D-Md.), the top Democrat on the committee, read through a highlight list of some of Friedman's most controversial statements, including likening a U.S. Jewish group to “kapos,” or Jewish Holocaust collaborators.

“I have questions about your preparedness for this position,” Cardin said. “I am unsure of how an individual with your record will or can represent all Americans to all Israelis, or whether you are committed to long-standing U.S. policy for the two-state solution.”

The liberal group Friedman had attacked, J Street, is generally critical of Netanyahu, who visited the White House on Wednesday. The organization has been among the loudest voices opposing Friedman.

Friedman told senators he has profound disagreements with the group but regrets that he did not express them “respectfully.”

Sen. Lindsey O. Graham (R-S.C.) also helped introduce Friedman.

“Mr. Friedman is very passionate,” Graham said. “He has said some things I don’t agree with, but I never doubt that he did it based on what he thinks was the right things to say at the time.”

Ruth Eglash contributed to this report.