Well in the US, even though almost everyone is an immigrant besides the Native Americans, this is not how many whites think unfortunately. Many see it is theirs because they fought for it, bought portions of it, traded for portions of it, settled unused portions, stole portions, etc. So once they did that, it established America as a homeland for those people... who of course were white, which is only relevant because it helps to form the basis of white nationalism.
So you have to start with the capitalistic notion of ownership. Everything before ownership is denied. The fact that the natives helped them to survive the winter and we celebrate that at Thanksgiving... this evidence of hospitality, a remembrance of their then status as immigrants and guests... denied. However they obtained ownership is, in their minds, righteous and just- from where the notion of "manifest destiny" comes into play. It is simply the idea that if you got away with it-if you were allowed to do it, like a con artist tricking someone out of their life savings, then it was God's will and now they are the rightful heirs to everything taken. Never mind, that the Natives had a whole different philosophy about land ownership. They had territories, but no one could own the land itself. After this point that "America" was established by whites, then the people who came over after were the "immigrants" to that new country of "America" and whites already here began calling themselves "native born".
America sometimes forgets its history. But that's a part of that assimilation you were referring to.
Before it was the Mexicans coming to work, it was the Italians. Before that, the Chinese and the Irish. The problem was unskilled labor competing with unskilled "native born" Americans. They were both racist AND nationalist, hating anyone they saw as a threat to their sources of income. Hatred of black people, I think, comes from economics more so than color. It is simply the color that helped unite them against us. They liked us better when we were free labor, used by the rich to do the jobs they didn't want to do; like picking cotton in the hot Southern sun and humidity. But when blacks were free they suddenly had to compete and this is where they really don't like the competition inherent to capitalism. Because capitalism is supposed to benefit THEM, as a group. When it doesn't that's when they interfere with it, and that's how you get labor unions and things like that which originally helped them shut black people out of their job markets. The same mindset, is of course, wanting to push back on globalization and foreign work... even though... that is also simply a product of capitalism. If you take the limits off corporations that is simply what they will do. And it's okay if it negatively affects other people. And competition is some kind of noble thing, when its other people competing in ways that create an advantage for them.
Now some people would say, "so what's the big deal about racism if Americans treated everyone the same way?" Well, first, they didn't. Blacks were not the only group to be lynched. But, to my knowledge, that was the only group to be treated as subhuman. And so after awhile, whites assimilated the irish and all these other groups into their "white privilege" while still excluding black and brown people.
Of course before all this, the rich were able to create a more hostile relationship between the poor of different races and nationalities. All they had to do was convince poor whites that they were at least better than blacks. So instead of working together we ended up working and competing against each other which created advantages for the rich; not to mention allowing them to stay out of the spotlight as a threat. People blamed other poor people and supported the rich getting even richer, thinking the rich were their friends... or at least... allies. Especially since they were white too, "in their minds this mattered". The rich could have hired them but instead it was cheaper to buy slaves. This turned into globalization because it was cheaper to employ poor Chinese in China. And NOW... the threat isn't Mexicans as much as it is automation because robots are better than slaves, from their vantage point. But again... poor people think the rich guy (Trump), who has a history of hiring cheap labor and hiding his money from taxes, is on their side. But when have the rich ever been on the side of the poor, throughout history? And I mean like WORLD history. We keep getting played against each other when there is a bigger threat and a bigger enemy that distracts us with perceived threats. And yes... as long as those poor whites who embrace racism, continue to do so, we cannot possibly work with them or see them as common allies against a common threat. And that's the point. That's the purpose. And that's why racism isn't just Billy Bob and his red neck cousin. It's systemic.
But in talking about system and institutionalized racism, black people aren't saying all whites are racist or that we don't like white people or that they are our enemies. I understand why some perceive this but its often with the assistance of the media instead of simply asking us. And I know this because fairly recently I've had good conversations where I was straight up asked the question. We need to ask questions instead of assuming the worst about each other. That's how systemic racism from the top is able to infect people at the bottom. We, and the failure is on both sides, fail to communicate.
But this is also why, strategically, the system we call Babylon, assimilates other ethnic groups, even ones it opposed in the past, into this racial construct called "white". Because this enables those assimilated factions to be united against "the other"; mainly non-whites. It does this through color as well as religion for the purpose of discrimination which is all about creating advantages for whites. They want us to believe they don't do this because they don't "hate" anyone when in reality hatred isn't a requirement of discrimination. It's a socio-economic construct designed for a socio-economic impact. I recently met a white woman with black children who is more passionate about supporting black businesses because she understands the economics of power, than most black people I know. It truly saddens me that my people, as a whole, do not seem to understand this. People get emotional and feelings get hurt when in reality this was always about money.
Until we talk about MONEY... in meaningful way as it relates to power... we will continue to fight the battle that Babylon wants us to fight; fighting other groups of poor people. And all the while they are transferring more and more of the worlds wealth to themselves because they really don't care about race very much at all, not ours. And not their own. What defines them, isn't being white (because they have no need of such a crutch) but rather being wealthy. So while we're talking about love and peace, they're calculating war for profits.
So are you white? Or something else? I don't know. Does it really matter? I think the fact you don't want to be assimilated... that matters. I think if you support liberation... that matters. I think if you are personally an ally... that matters. I think if you support minority owned businesses... that matters. If actually have real conversations with black people... that matters. If we can respect each other as individuals... that matters. Because eventually we have to build something together that can be an alternative to Babylon. And that's probably not going to be a nation but rather more of a "network". Think about the disruptive power of the internet and how it connects us. That's the key.