What leftist racism was accidentally out in the Sydney Sweent ad?

Its a well known fact that leftists make up a lot of bullcrap dog whistles for racism, for example when taught us that guy here was pandering to white supremacists when he did this sign here

Old man doing a white supremacist symbol according to leftists.
Old man doing a white supremacist symbol according to leftists.

So what was the newly discovered leftist racism it would take a true leftist racist to recognize?

What leftist racism was accidentally out in the Sydney Sweent ad?
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