Voat anon here. I found the reason Jerrold Nadler was so adamant with his claim that Antifa is a myth during the Barr Hearing.

https://www.discoverthenetworks.org/individuals/jerrold-nadler/

BINGO! Nadler like The Squad is a member of DSA (Democratic Socialists of America).

He has ties to Antifa

https://www.discoverthenetworks.org/organizations/democratic-socialists-of-america-dsa/

Take a look at the list of persons section of the connections.

All of them via DSA have ties to Antifa.

Sample names: Nancy Pelosi, Barack Obama, John Kerry, Barbara Boxer.