Israel-Gaza updates: Netanyahu says Israel 'can't be flexible' on some issues

Israeli Defense Minister Yoav Gallant appeared to take a swing at Israeli Prime Minister Benjamin Netanyahu during a Knesset committee meeting about Israel’s response to ongoing cross-border tensions with Lebanese militant group Hezbollah.

"I hear all the heroes with the war drums, the 'absolute victory' and this gibberish," Gallant reportedly said, alluding to Netanyahu's slogan through the war, according to Israeli media.

Netanyahu's office released a statement shortly after, saying Gallant too is bound by the policy of "absolute victory."

"When Gallant adopts the anti-Israel narrative, he hurts the chances of reaching a deal for the release of the abductees," the Israeli Prime Minister's Office said. "He should have attacked [Hamas leader Yahya] Sinwar, who refuses to send a delegation to the negotiations, and who was and remains the only obstacle to the kidnapping deal."

National Unity Party Chairman Benny Gantz warned about internal divisions in Israel during an address on Monday.

"If we don't come to our senses, there will be a civil war here," Gantz said.

He said there have been "heroes," from soldiers to volunteers, in the wake of the Oct. 7 attack, but also "leadership that dissolves, networks that poison the well from which we live."

"The patriotic Israeli majority should stop the hatred and make amends," Gantz said.

-ABC News' Jordana Miller

While the weekend passed with no direct retaliation from Hezbollah for the killings of several top leaders by Israeli strikes, the group said it still plans to strike.

"The response is coming and inevitable and there is no turning back from it," Ali Damoush, the deputy chairman of the Executive Council of Hezbollah, said Monday.

The Hezbollah official saif America, Great Britain, Germany and everyone who supplies Israel with weapons is a partner in the Gaza massacres.

"Israel does not find any practical and serious response to its massacres, and this is what encourages it to continue committing crimes and massacres, and without effective pressure Netanyahu will not stop his crimes," Damoush claimed.

Amid fears that an attack from Iran may be imminent, the commander of Israel’s Air Force, Maj. Gen. Tomer Bar, has issued an order barring servicemembers from traveling abroad. The directive applies to career officers and non-commissioned officers, not conscripts, according to the Israel Defense Forces.

-ABC News' Jordana Miller

The U.S. is "strengthening" its capabilities in the Middle East by sending an additional guided missile submarine to the region "in light of escalating regional tensions," according to a statement from Pentagon Press Secretary Maj. Gen. Pat Ryder issued on Sunday.

The update comes the same day Secretary of Defense Lloyd J. Austin III spoke with Israeli Minister of Defense Yoav Gallant.

"Secretary Austin reiterated the United States' commitment to take every possible step to defend Israel," according to the statement.

Secretary Austin ordered the USS Abraham Lincoln Carrier Strike Group, equipped with F-35C fighters, to accelerate its transit to the Middle East, which was previously expected to get there by the end of the month.

The Lincoln was already en route to replace the USS Theodore Roosevelt, but will now add to the capabilities of the Roosevelt

Additionally, Austin has ordered the USS Georgia guided missile submarine to the Middle East.

The statement doesn’t say how soon the Lincoln or the USS Georgia will arrive in the region.

-ABC News' Anne Flaherty