Antifa is short for “anti-fascist.” Despite its name, Antifa uses heavy-handed fascistic tactics and is infamous for assaulting conservatives, Republicans, and those who identify with the so-called alt-right.

Langer is a former member of the Autonome Antifa, formerly one of Germany's largest Antifa organizations, which disbanded in 2004.

Ngo’s employer, Quillette magazine, wrote in an editorial on June 30 saying Antifa had “attacked him for the simple reason that he has challenged their ideological propaganda—an Antifa tactic that any true fascist would recognize and applaud.”

“The day we see that many people dressed in black with antifa slogans at Assas, it will be known,” he said, questioning whether the demonstrations reflected the views of the institutions' students.

A search on Walmart's website of "Antifa" turned up no results on Sunday. More than a dozen shirts were still listed on the website, according to IJR, and some read, “Antifa forever,” “proud to be Antifa,” and “we are Antifa.”

Antifa claims to be "anti-fascist," but labels groups that are even remotely conservative as "fascist."

Antifa members march during a rally in Berkeley, Calif., on Aug. 5, 2018. (Amy Osborne/AFP/Getty Images) Portland Arrests On Nov. 19, six Antifa members in Portland were arrested during clashes with other protesters. 

Recommended Video: The Origins of Antifa

Recommended Video: The Origins of Antifa

During a press conference on Aug. 15, President Donald Trump denounced the KKK, the neo-Nazis, and the group of anarchist communists known as Antifa. Many Americans likely don't know very much about the third of these groups, the Antifa.

Loudon said in Orlando, Antifa is very close to the Democratic Socialists of America. The Texas branch of Antifa is tied to the local Red Guard, a Maoist organization.

He cited the State Department saying that Cuba has “cultivated ties to subversive and radical groups” including Communist Party USA, Antifa, and the Democrat Socialists of America.

In February, a change.org petition was circulated to declare Antifa a terrorist organization. 

Antifa extremists attack a man at Martin Luther King Jr. Civic Center Park in Berkeley, Calif., on Aug. 27, 2017. (AMY OSBORNE/AFP/Getty Images) The violence was the latest in a string of violent actions by Antifa.

Antifa is currently being investigated by the FBI for domestic terrorism. A joint intelligence assessment by the FBI and the Department of Homeland Security (DHS) described Antifa as committing terrorist activities as early as last year.

On Saturday, video footage showed an Antifa member smashing a counter-protester in the head, leaving the man bleeding profusely.

Amid the protests on Aug. 27, black-clad members of far-left extremist group Antifa attacked several peaceful right-wing protesters, according to the Daily Caller. 

During the rally, hundreds of Antifa and communist protesters shouted "no Trump, no wall, no USA at all." Antifa extremists could also be heard shouting "whose streets, our streets."

Byron White, a public information officer with the Berkeley Police Department, said he could not disclose the details of the arrests that took place, but did confirm that prominent Antifa extremist and national organizer for By Any Means Necessary, Yvette

Today, Antifa is still connected to communist groups.

v=EuNKs0RKHtw The FBI is currently investigating Antifa extremists, and branches of Antifa have been listed as domestic terrorist organizations.

Antifa is already categorized as a domestic terrorist threat by New Jersey's Office of Homeland Security and Preparedness. Some branches of Antifa are more open with their promotion of extremist violence.

I'm just wondering, moderate left, how long are you going to stay silent on Antifa," he said. Berkeley's mayor Arreguin also called on the left to take a stronger stance against the Antifa extremists.

The BLM activists can be heard telling Antifa to leave the city.  The Antifa crowd start yelling back at the BLM activist shouting out, "He's a cop! He's a cop! He's a cop!" 

ANTIFA have demonstrated time and time again that they're more than willing and able to fill these criteria," the petition reads. "We're asking that the president formally declare ANTIFA a domestic terror organization."

Among the signs held up in the crowd were messages reading “High schools repressed, universities enraged,” “Sexy antifa girl,” and “Bismillah, it’s darkness,” using the Arabic expression meaning “in the name of God.”

The protestors were part of Antifa, a group of far left protesters who showed up with purple shields and bats at the funeral located in Paramount Theatre, Aug. 16. 

And antifa organizations specialize in using protests as cover for carrying out acts of mayhem.

The White House released a new counterterrorism strategy in May, identifying violent left-wing extremists such as Antifa and anarchist groups as terrorism threats. It also addressed the “red-green” alliance between the far-left and Islamists.

Antifa was just revealed as having ties to Hamas and to Iran’s Islamic Revolutionary Guard Corps, according to a State Department memo targeting an organization that runs digital tools used by Antifa as well as other violent terror groups.