Pennsylvania Senator John Fetterman, a Democrat, elicited boos and verbal attacks from anti-Israel protesters when walking past them waving an Israeli flag.

Boos and shouts of "Shame!" were thrown at Fetterman as he exited the building, waving the Israeli flag while passing progressive protesters from the veterans group About Face calling for a cease-fire amid Israel's war against the Palestinian terrorist organization Hamas.

Several protesters were in the process of being arrested outside the Russell Senate Office Building as Fetterman walked by, while others — including one wearing a keffiyeh, a symbol of Palestinian nationalism — shouted at the senator from behind police tape.

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"What a joke!" one protester yelled as Fetterman passed by them. Another accused Fetterman of supporting "genocide."

Fetterman, however, laughed off the criticism, continuing to wave the Israeli flag and walking off as the protesters chanted for a cease-fire.

One protester was heard at the end of the video shouting that Fetterman was "doing a disservice to Pennsylvania."

"Jacka-- [Fetterman] saw veterans getting arrested and laughed," tweeted About Face, the progressive, anti-war veterans group that called for the National Guard to "stand down" to Black Lives Matter protests in 2020.

"We asked to see [Senator Kirsten Gillibrand]," About Face continued. "We were put in cuffs."

"We need leaders who listen to veterans demanding a [cease-fire]," the group added.

Fetterman's office did not immediately respond to Fox News Digital's request for comment. Neither did Gillibrand's office or About Face.

Fetterman, a progressive Democrat, has been a staunch ally of Israel amid the war sparked by the October 7 surprise terrorist attacks on Israeli civilians by Hamas.

The senator's support for Israel has put him at odds with many in the progressive wing of the Democratic Party.

Fetterman, who had a stroke while on the campaign trail, jabbed at a pro-Hamas activist who heckled him over his pro-Israel stance, saying the "joke" was on the protester because Fetterman "can't fully understand what you're saying."

A pro-Palestinian former adjunct law professor from Pittsburgh confronted Fetterman over his stance at a bar over Halloween weekend.

The professor was eventually thrown out of the bar by a man dressed in a John Fetterman Halloween costume.

Jill Stein, a physician and climate change advocate, announced Thursday her bid to seek the Green Party’s nomination for the 2024 presidential election.

Stein announced her intention to run on social media and vowed to end the nation’s two-party rule, address the "climate collapse" and advance a Green New Deal. Her campaign’s official launch will kick off on Nov. 21.

"The political system is broken, the two parties of war and Wall Street are bought and paid for," Stein wrote on X.

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"The ruling parties that got us into this mess aren't getting us out. Both parties are squandering trillions on the endless war machine, fueling conflict around the world while tens of millions here at home lack food, housing, and healthcare."

"We need real choices on the ballot, because without freedom of choice in elections, there is no democracy."

Her campaign slogan is, "People. Planet. Peace."

Should she secure the party’s nomination, it will be Stein’s third time running for president, having been unsuccessful in 2012 and 2016.

Stein’s 2016 presidential bid was criticized by some Democrats who argued she siphoned valuable votes away from Hillary Clinton. Stein received 1.07% of the popular vote in 2016 and 0.36% of the popular vote in 2012.

In 2016, she also pursued recounts in Wisconsin, Michigan and Pennsylvania — three states where Former President Trump beat Hillary Clinton.

Stein’s 2024 bid is centered on advocating for an Economic Bill of Rights and a Green New Deal, a sweeping set of socialistic legislative proposals.

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"To reverse surging inequality, we need an Economic Bill of Rights including the right to a living-wage job, housing, food, healthcare, education and more, to guarantee all of us the basic security for a good life."

"We need a Green New Deal with massive investment in green jobs and technologies to revitalize the American economy, improve our lives, protect our planet and safeguard our children’s future."

Stein’s bid also comes as a number of other long-shot candidates have entered the race. Robert F. Kennedy, Jr., is running as an independent, while Cornel West is also running as an independent, having switched his registration from the Green Party. Progressives Marianne Williamson and Cenk Uygur have also launched long-shot bids.

Paul Steinhauser contributed to this report.