This is explained by goals of our genocidal warmongering capitalist rulers. Capitalists seek to divide working class so they don't realise capitalists serve only their own interests and don't care about working class. Pro-Palestine movement threatens working class solidarity, threatening capitalists
anti immigration rally divides working class, especially white working class, serving capitalists interests.
Personally, my own view is that I'd find it hard to have friends or date people or you know, be born, if there was no immigration in australia. Very depressing that Albanese is doing everything he can to reduce it :(