I think it's the big picture of racially motivated violence that the meme pokes fun at in particular.
Side note, the UK is the one mirroring the US' authoritarianism the fastest and the closest anyhow. They're having the same narrative problem of getting the dumbest of their population to believe that all their problems are because of immigrants existing.
Can we stop calling right wing billionaires populists? Because that's oxymoronic, and full of shit.