Many supporters of Antifa and other antifascist groups point to the Battle of Lewisham and the Battle of Cable Street as deserving success for the the decline in fascist movements. I can't help but notice these occur late in the 1970s and the late 30s, right before the economy started to improve in both instances.
How much can we credit the movement's violent opposition, versus economic changes, versus a shifting focus on the evils of Nazi Germany/apartheid in S. Africa for the decline in the far right? Are there any other factors that played a part that are being ignored?
As a follow up I'll also throw in /u/nerdovirales questions that didn't get answered:
Did these violent clashes lead to the suppression of the British Union of Fascists and the National Front, respectively? Did they have a significant effect on the politics of their time more broadly? Are there other significant instances of civilian-led violent resistance to extremist politics in Britain in the 20th century?