I am not suggesting what happens in the linked article is justified, Given what people have to put up with, in your case from the proud boys et al, the authorities and state inability to get a grip, we have a similar issue with the MET police in the UK which they are tryng to sort out.
You can understand why people group together and take the law in to their own hands.
Haiti crisis: Mob burns suspected gang members to death
https://www.bbc.co.uk/news/world-latin-america-65381624