How is that "between the lines"? Yes, that is the goal. If your argument is that it's just because of simple racism or something, then make that argument.
I've heard "culturalism". It's devastating that this game even needs to be played. It should go without saying that rejecting foreigners under certain circumstances is not automatically "racism" in the petty sense.
That's just the word we use for racism when the "other" isn't primarily a single visually distinct race. They're both low-quality words used mostly as insults rather than literally.
How is that "between the lines"? Yes, that is the goal. If your argument is that it's just because of simple racism or something, then make that argument.