If you really believe what you wrote then I'd suggest to "GetThemOut*" your own immigrant heritage out of the country.
* as your trolling username says
And your lesson from this is that Native Americans should continue to be ignored and more immigrants let in?
If you care about Native Americans (and don't just use them as a rhetorical device to argue with people on the internet) then surely, you'd support a reduction in immigration, right?
No, that is just the conclusion you want to make. Stop putting in my mouth the words I didn't say.
The natives rightly attempted to fight off the Europeans. They lost.
It does not follow that the Europeans here now should just let in whoever wants to come in, to the point that the Europeans themselves are outnumbered.
If the Europeans fight and the newcomers win, so be it. But why should the Europeans lay down and let it happen? Especially when they trivially have the ability to stop it, unlike the natives. For now, anyway…
Have you looked at the projected future demographics in America if the current trends continue? What does it matter if it's peaceful in the moment or not if the end result is the same? If you are forcibly invaded and become 10% of the population, vs if you let it happen, what is the difference?
The only difference I can see is that if you are letting it happen, you can be convinced to not let it happen and then act accordingly. Whereas if you aren't letting it happen and it's still happening you may just not be able to stop it. So the current situation is really odd.
Also, if you numerically lose control of a territory, you do open yourself up to actual genocide in the future. Can you not imagine a scenario where the other groups gang up on Europeans if the Europeans no longer have the power to stop it? And again, if that somehow happens naturally in the far future I'm not going to lose sleep over it. But if Europeans are convinced that this is a fair and even good thing and shouldn't be resisted, well there is clearly something wrong with them mentally.