Germany's leaders are struggling to figure out how to counter a recent rise in right-wing hate, 75 years after the Nazis were driven from power.

Mathews was indicted alongside two Americans, Brian Mark Lemley, Jr. and William Garfield Bilbrough IV, who are also alleged to be part of white supremacist group "The Base."

Twenty-seven year FBI veteran Jack Cloonan says that The Base and international terrorist groups share similar goals, such as the destruction of U.S. government.

The arrests come a day after three other members of The Base, a collective of hardcore neo-Nazis that operate as a paramilitary organization, were arrested on federal charges in Maryland and Delaware.

ReDirect was set up to deal with people leaving for overseas to fight for ISIS. It now helps those with violent ideologies, socially awkward youth or new Canadians struggling to fit in.

The demand, including more training to identify and weed out members of hate groups, follows an internal military report and several high-profile incidents linking some service personnel to right-wing extremists.

The suspect had been apprehended after the attack, in which shots were fired but no one was hit.

German police said on Friday they had opened a criminal investigation after a broadcaster published video of far-right protesters speaking approvingly of the murder of a politician.

The Canadian Anti-Hate Network said in a statement Thursday it believed this was the first time activists had sought a peace bond in response to right-wing extremist threats.

Recent surveys show that knowledge of the atrocities during World War II is declining.