Rocklea United's (nowadays known as Brisbane Knights) bombastic fans always went along to support Sydney United or Melbourne Knights whenever they were playing Brisbane Strikers in the NSL.
As did Gold Coast Knights fans.
Certainly added to the atmosphere which would normally have been non-existent at a dreary Strikers game in the old NSL.
As an outsider who came to Australia I honestly feel from a footballing culture point of view killing off the NSL's ethnic club culture was a massive fuck up on the part of the Soccer Australia and later the FFA....
People will probably disagree but that ethnic club culture, whilst not without it's issues was undeniably Australian football's beating heart passionate, tribal, community-driven support which was never replicated with the A-League franchise licence systems.
Australia's strength is its multiculturalism. Soccer should have leaned into that heritage more smartly when they tried to re-invent the game.
Trying to engineer popularity to families and general sports fans at the expense of what already existed is never a great idea when it comes to football.
Awaiting a backlash!!
