Who is behind Sydney's recent neo-Nazi activity, and should we worry?

Sydney witnessed neo-Nazi incidents across three consecutive days over the Australia Day weekend, prompting fears the ideology is gaining popularity in Australia. So, who are the people behind these incidents and should we be worried about a potential rise in neo-Nazism?

A supplied image shows a group of about 40 men seen wearing black balaclavas and brandishing Australian flags at Artarmon train station in Sydney, Friday, January 26, 2024. Passengers have been evacuated after a group of men wearing black balaclavas and brandishing Australian flags swarmed a Sydney train. Credit: (AAP Image/Supplied by Transport for NSW)