BlackJesus
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Well, as far as America is concerned, yes we're the main ones who fight against White Supremacy in the United States.
However, it's a bit disingenuous to say that no other group of Black people (Afro-Latinos, Jamaicans, Africans, Haitians, etc) from different parts of the world or even in the US itself fight against White Supremacy. They do fight, it's just their strategy, methods, etc differ from how Black Americans stand against White Supremacy, racism, etc, due to the complexities and nature of how it operates and the interpretation of it in their homelands.
White Supremacy, on the surface, is all the same, but how it's culturally ingrained and operates differs from region to region. Similar to how social structures in America don't always apply to other parts of the world. For example, Apartheid era South Africa and Jim Crow-era America, on the surface, they both seem the same in terms of their overall theme of segregating and subjugating Black people and South Africans; however, beyond the surface, they are actually very complexly different in their methods.
As far as other non-Black groups are concerned, I'd say overall, no, other minority groups such as Asians, Chinese, Latinos (specifically of a White/Euro descent), Mexicans, Jews, etc are flaky, deviod of heart/courage, or fight and unfortunately oftentimes rather submit to White Supremacy, y'know the old saying “If you can't beat 'em, join 'em” is a great way to describe other groups effort or lack thereof in terms of combating White Supremacy, systematic racism, racist practices, prejudice, and bigotry.
China seems to be fighting white supremacy well enough. Whites don’t run their country or economy. They have nukes, technology and a smart, large population.