A senior Republican congressman told Fox News Digital he felt sickened after viewing footage of Palestinian terror organization Hamas' Oct. 7 surprise terror attacks that killed 1,200 Israeli citizens.

California Republican Rep. Darrell Issa spoke with Fox News Digital over the phone after viewing the footage with most of his congressional colleagues.

Issa said the "vast majority" of congressional lawmakers were in the Cannon Caucus Room to view the footage. The congressman noted that there were "over 300" people in attendance, which led to the screening being "standing room only."

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The senior House Foreign Affairs Committee Republican said the footage of "uniformed, military Hamas and civilian-dressed Hamas" killing "unarmed civilians" made him sick.

"I've seen decapitation and I've seen just beating, and beating on both dead and alive bodies," Issa said. "And quite frankly, I'm just sick to my stomach."

Issa said he believes the "most important detail" was the multiple sources of the footage. Some videos came from terrorists' own social media posts, but most were from body camera footage and cellphone footage recorded by Hamas.

"I mean, the details. And you can hear it, but when you see it, it's like visiting Auschwitz or Birkenau, except it's still going on visually," Issa said.

Since the Oct. 7 attacks – during which Issa was in the Middle East – antisemitic hate crimes have dramatically increased, according to the Anti-Defamation League. Protests against Israel have also intensified, and there are numerous viral videos of protesters ripping down posters of Israelis who have been kidnapped by Hamas.

"I respect people's rights to protest for the things that they think are unfair," Issa said. "This isn't one of them."

"Gaza was not occupied. This was not a resistance within Gaza, but rather a deliberate attack on civilians over the border," he continued.

Issa said the situation is one of "two separate things" and that we "can talk about the unfairness of the Palestinians not having a country of their own." But those discussions should be separate from condemnation of what was shown to members of Congress, Issa said.

The videos depicted "the unprovoked slaughter of civilians, a degree of inhumanity that you usually think for the machete world of elsewhere, but not in an area where education and opportunity is available the way it is for the Palestinians in Gaza," Issa said.

The California Republican said he believes the House "did the right thing" by passing the Israel aid bill "overwhelmingly" earlier this month, a bill that paid for aid by slashing the Internal Revenue Service's (IRS) funding.

Issa blasted President Biden as well, saying the president is "not complaining about the offset as much as he's complaining about it not being in two other areas."

"I don't think anything could be less appropriate. You know, funding for Ukraine and the ongoing war there, which is a military-on-military war primarily, is something I support. But supporting two fronts against two aggressors doesn't have to be combined. And, you know, I think the Senate is being petty, I think the president's being extremely petty."

Issa said the Constitution is "very clear" on the House's job to appropriate and that they have done that job while trying "to do it in a responsible way by finding funds that are less important."

"And right now, we're making them available," Issa said. "And I don't think there's anything wrong with that. I've supported every package for Israel since I've been here, this one is no exception."

The White House did not immediately respond to Fox News Digital's request for comment.

EXCLUSIVE: House Freedom Caucus Chairman Scott Perry, R-Pa., is warning that House Speaker Mike Johnson, R-La., may have to "reassert some authority" in Congress after his plan to avoid a government shutdown got a rocky reception from GOP lawmakers. 

"You have one opportunity to make a first impression. And while our colleagues in the Senate…want to continue the unbridled spending and the policies that are destroying my constituents’ lives, this is the one opportunity the speaker has to make an impact on that and say, ‘We're just not going to do that,’" Perry told Fox News Digital in an interview on Tuesday morning.

"He could have sent, I think…something that's reasonable that the Senate would not be able to resist, but that's not going to be the case here. And so, I think in that circumstance going forward, he's going to have to somehow reassert some authority that hasn't been asserted now."

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Perry is part of the growing Republican opposition to Johnson’s plan, a simple extension of last year’s funding priorities known as a continuing resolution (CR). His "laddered" approach would set two different funding deadlines for Congress’ 12 individual appropriations bills – a Jan. 19 date for four of the less traditionally controversial bills, and Feb. 2 for the others.

The "ladder" was initially championed by members of the Freedom Caucus, but Perry explained, "We were for the ladder approach, but don’t confuse the ladder with the fact that this changes no policy and no spending."

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Johnson’s plan is expected to get a vote late on Tuesday afternoon. House leaders are planning to skirt normal procedures to pass the bill under suspension of the rules, meaning it will not need to go through a preliminary procedural vote but, in exchange, will need two-thirds of the House to pass. 

"Unfortunately, what that might result in is more Democrat votes than Republican votes," Perry said. 

He did not say if such a result would lessen his confidence in Johnson’s leadership, but he suggested the new leader would have ground to make up.

"What I hope it will do is inform the speaker, the rest of the conference, that the approach that we initially offered, that I thought was being considered, that I hoped would be considered, was actually the way to go," Perry said. 

"So moving forward, instead of surrendering on first down, we can actually run a couple of plays."

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Multiple sources told Fox News Digital that one of the measures in a recent conservative CR proposal was to separate funding for the Justice Department and Department of Homeland Security to put added pressure on lawmakers to reckon with those spending priorities specifically.

Current government funding runs until this Friday. Former Speaker Kevin McCarthy, R-Calif., narrowly avoided a government shutdown on Sept. 30, the end of fiscal year 2023, by passing a "clean" 45-day CR – a move that ultimately cost him the gavel. 

Perry said he did not believe Johnson’s plan would cause him to be ousted like McCarthy was, and that the ex-leader was voted out of the job because of "an accumulation of infractions."

"It's unfortunate that he has been placed in this position at this point in history," Perry said. "Unfortunately, a lot of this is out of his hands and not of his doing, and I think that there's going to be some grace provided because of the circumstances."