civil rights movement was happenstance? The me too movement was happenstance? The Oscars are white was happenstance along with Womb Fire and more?

Yes. Those things aren't done with the Asian or Latin community in mind, so they're not an example of black communities "going to bat" for either of the aforementioned demographic. It's great, and black people and black communities have definitely created a lot of very important activist movements in the last few centuries. But to say this was done for Latin or Asian communities is like saying white feminists went to bat for black women because of the multitude of ways all women have benefited from the road paved by white feminists. Credit where credit is due, but I'm not attributing intention where there wasn't any.

The comment about the black community not being diverse is completely false and ignorant.

Look, if I told you I have a friend who is "Asian", what does that tell you about her? Can you tell me anything about the language she speaks? The food she eats? How she left her country of origin? When she left her country of origin? Her religion? Her skin color? Can you even begin to guess?

There's diverse and then there's diverse. Sure there are variations of culture and language within the black community, but the "dominant" narrative in North America is centered around the trans-atlantic slave trade from mostly west Africa to southern US as an inhumane response to a demand for human labor. There are variations, like the African slaves who were "moved" to Central or South America, and later waves of immigrants to the Americas either from Africa or of African descent (though some of them may not "identify" as black, preferring to identify with their nationality or ethnic group as they don't have much in common with the dominant black north american narrative). But you cannot deny the dominant narrative that the black north American community rally itself around.

On the other hand, a woman of Vietnamese descent born to a family that came to America as a refugee of the Vietnam War has next to nothing in common with an Indian Phd candidate in America on a student visa. Hell, it might piss you off, but they have less in common with each other than you do with a white American- they don't eat the same food, they don't follow the same religion, their families didn't fight the same wars, they probably didn't speak the same first languages. They don't even look alike (honestly, I would not have known Shaun King was a black man), and yet they would both share your "Asian" label. There's no dominant narrative that defines this category. It's a makeshift "other" group.

If you understand this, then I don't get how you could at any point believe that "PoC"s would join hands and sing Kumbaya. I say this not out of spite but because I think you and some black women ITT sound disappointed and really, if you knew what you were asking, you shouldn't be. The black community is great and their stories need to be told in all its details. But the rest of us have different stories and different communities and we'll continue to be a disappointment to you until you can understand and respect that.