[2] In early 2020, Heimbach and Parrott once again began collaborating on projects such as the Global Minority Initiative, a "prisoner aid organization",[3] and they publicly discussed a relaunching of the Traditionalist Worker Party.

[5] Heimbach was considered the leader of this community, and he had received media attention for his role in this regard, but he lost credibility following his arrest in 2018.

"[11] To promote his anti-Semitism, Heimbach publicly supported Palestinian Nationalist organizations such as Hamas and Islamic Jihad writing that there should be "a unity between those who struggle against the Zionist State and International Jewry here in the West and those on the streets of Gaza, Syria, and Lebanon.

[8] As the leader of the Traditionalist Worker Party, Heimbach visited European far-right organizations in Germany, Slovakia, the Czech Republic, Romania, and Russia.

[26][27] The Traditionalist Youth Network (TYN) was established in May 2013 by Matthew Heimbach with Matt Parrott as an offshoot of a "White Student Union" which was active on the Towson University campus.

[29] The Traditionalist Worker Party promoted itself as being a working-class and "left-leaning" neo-Nazi organization more akin to the original Sturmabteilung than more common far-right ideological beliefs of most post-war white supremacists.

[1][5] Following the model of other white supremacists such as George Lincoln Rockwell and Richard B. Spencer,[30] Heimbach organized speaking engagements at American universities,[31] causing mass protests by both students[32] and community members.

The caption to WBEZ's photo of insurrectionists confronting U.S. Capitol Police outside the Senate chamber identified "Neo-Nazi Matthew Heimbach (second from left wearing a blue mask).

[39] Brian McCreary, a resident of Massachusetts, was arrested in February 2021 for his participation in the January 6th protest and was identified by police as the individual who had previously been mistaken for Heimbach.

[40] In July 2017, Heimbach pleaded guilty to second-degree disorderly conduct for an incident when he repeatedly pushed an anti-Trump protester at a Donald Trump campaign rally in Louisville, Kentucky.

[42][41] In October 2017, Heimbach was listed as a defendant in Sines v. Kessler, the federal civil lawsuit against various organizers, promoters, and participants of the 2017 Unite the Right rally.

[43][44] Heimbach and all other defendants were found liable for civil conspiracy under Virginia state law, and ordered to pay $500,000 in punitive damages.

The jury were deadlocked on the two other claims pertaining to Heimbach, which argued he and other defendants had engaged in a federal conspiracy to commit racially-motivated violence.