Dutch, Japanese, Mexican etc, those are nationalities and are all meaningless scientifically and biologically.
I hear this point raised somewhat frequently, and I understand the sentiment, but it's just incorrect. There are physical and genetic differences between different groups of people from different parts of the world. We are all human and all deserve respect, but I think papering over our differences and declaring we're all the same introduces an unnecessary level of doublethink to the discussion.
There's a lot going on here, so I won't try to respond to all of it.
My point is merely that there are population clusters with genetic differences. It's incorrect to say that we are all human, therefore scientifically we are all the same. In aggregate, the people of Japan are not the same as the people of Ireland. (This paragraph makes zero claims about individuals; it is scoped to large groups of people.)
I just want to clarify that I'm not claiming that "race" per se is a thing, nor am I claiming that there are any mutually-incompatible human species. I'm not attempting to say anything about nationality, country borders, or deportations. The political madness happening in the USA is truly disgusting. I am deeply saddened by the cruelty and hatred that's on display.