I think a few here is fond of the old Franklin Delano Roosevelt, but looking into the actions that he did during the years into the prelude of World War 2 was really interesting. At his behest, he supplied Joseph Stalin and the whole Soviet Union of military equipment and intelligence to prepare for the Nazis. I really don't think that Americans during at the time was on board with supplying another enemy, the communists, with their own handmade products just to hold off the Reich.
Let's not get started with the internment camps he did against Americans of Japanese lineage after the Pearl Harbor attacks, how the Democrats were tight-lipped about it to this day, and the communist project that the former First Lady, Eleanor Roosevelt did in Arthurdale, Virginia, that was still left untold on how many people died due to starvation on that god forsaken experiment of hers.
Props, but I think it's generally a criticism that is made in quite bad faith. In retrospect, it was a bad policy, as Japanese Americans were loyal to an astonishing extent, but it's easy to second-guess.
Please, the majority of the right isn't even prepared to entertain the concept of racial internment. The only people on the right who would welcome it are the extreme white nationalists. Particularly in regards to Asians.
What if racial internment were necessary for the survival of the country?
There is really no point where that is ever necessary.
There are basically two situations that could seemingly justify it, and you still shouldn't do it because it's a shit longterm strategy.
The worst-case Anschlaus scenario - The vast and sweeping majority of an entire ethnic group, that already lives in your country, and is in positions of power all over the country, are literally attempting to submit assimilate your country into a separate racial supremacist country of a different race, and that country plans on treating you as a racial inferior in your own country.
Even in this absolutely dire case, which I don't think has ever happened before, your primary objective would be for mass repatriation. Your "internment" camps are basically to deport them, not to keep them. And even then, you'd probably be better off partitioning the country if you were being threatened by a larger racialist power.
The other scenario is the Sea People's scenario - There are so many refugees from some land that to even contain them, you have to basically let them colonize some territory, and they keep pressuring you because of some ability to generate more military force than you... as an irregular military force. Again, you would not be interning your own people in this case, even if they were the same race as the invading horde (and I mean that literally). Not only that, you'd want to spend most of your time trying to set the horde against itself by promoting sectarian tensions, and guarding your border better.
Again, imprisoning loyal subjects due to their race alone, is utterly asinine. In particular situations like this, you need loyalists who are aware of the culture and politics of the horde. You wouldn't imprison them, you'd promote them.
All other situations, including colonization, sectarianism, imperialism, terrorism, religious extremism, would require different responses, and literally all of them could still be handled under a standard of individualism, rather than collective punishment.
It really just makes no sense. The hypothetical scenario where internment is a good idea is such an extreme case that it's never happened.
It's like asking: what if you needed to mass execute 75% of your own population to save your country? How that would there even be a cause for such a situation. At some point, the context of the scenario would be so different that a solution like that would be unreasonable compared to, effectively, defeatism or a recognition that you can't achieve your goals practically.
At some point, if "winning" is so unreasonable, then you need to are including as "winning".
The only reason anyone would do this, is because they are a wild-eyed racist like FDR, who was basically seizing the wealth of Asians in California, and then importing black voters into Asian communities to improve his political standing.
I shouldn't have to explain why it's stupid to intentionally racially balkanize your country, but these are the Democrats and Socialists we are talking about.