If you're comparing the effects of the influx of immigrants on current, mainstream American culture with the destruction of Native American cultures by white immigrants to North America, I have to take exception to that. There is no congruence whatsoever between the kind of shift that occurs when separate cultures encounter each other and mingle, and, well... genocide. That is what was done to Native Americans, and it's offensive to suggest that it was merely a failure of white settlers to "assimilate" to indigenous cultures that led to the almost complete obliteration of the latter.
I didn't make any comparison whatsoever did I Vanya. I made a series of comments about the process. That process can be relatively peaceful or decidedly violent. But that is just how it goes.
Now I have a question as long as we are discussing the genocide of the Native American Tribes.
Which tribes were not treated so harshly?
The process started when the white man came to the Americas, but just focusing on North America, which tribes were assimilated and which ones were almost annihilated?
I'll save you some effort particularly since the number of tribal names is, well, numerous.
The ones who peacefully adjusted to new ideas and joined themselves living among the white people were peacefully assimilated. Those that resisted violently were destroyed.
I am not saying I agree with it, condone it, or support it, it's just the way it was done.