I'll use your message to springboard off of to talk about the
British concentration camps in the Boer War (c. 1900) which resulted in the deaths of 26,000 women and children.
I first heard about them in the recent British future-history mini-series on HBO,
Years and Years. In that series ("20 minutes into the future", though more like up to 2030), the UK gets a Trumpian PM (though far more intelligent and eloquent) who implements a system of "erstwhiles"; ie, erstwhile facilities like military bases, hospitals, etc, that are converted into concentration camps for refugees.
In that show, the UK government's plan was to crowd as many refugees as possible into these camps, including those sick with yet another new bird flu, with no medical care, practically no sanitation, and meager food, and let nature take its course. In the show, PM Vivian Fox brought up the Boer War concentration camps as an example of how effectively such camps can eliminate undesirables, which as I said is the first that I had ever heard of those camps.
Now, aren't those the kinds of conditions that the US government is now creating in its own concentration camps?