How do you know they aren't Left Wing Marxist Anarchists?
A number of members of a Neo Nazi group have been identified and some arrested at the protests, as well as being identified as protagonists. Melbourne has had a problem with Neo Nazi groups for a while, its not new, not long ago there was a big issue with someone flying a WW2 Nazi flag in plain view on his street. Trump protesters are obvious, they are flying flags for his re-election among the protesters. If there are Marxists joining forces with nazis and trump supporters, it will certainly add to the diverse mix of crackpot extremist, but I'm pretty sure they will be fighting each other not sharing chants. It doesn't take much brain power to see most groups involved are right wing. The tradies there are not representing the CFMEU either as that union has denounced the protests, it all started attacking the CFMEU headquarters for backing mandatory vaccinations.