If they aren't being treated like POW's then your argument doesn't hold in this case. So hunches for instance aren't reasonable because they will lead to non-P

If they aren't being treated like POW's then your argument doesn't hold in this case. So hunches for instance aren't reasonable because they will lead to non-POW treatment of whoever is detained. How they are classified is also no longer relevant as we are talking about a proposition to detain and mistreat regardless of classification. And I'd go further and say it's deliberate. Similarly, I don't really hold with arguments that are based on others doing the same or worse. It doesn't change for me that the objective here being pursued is collective punishment. What's been enacted is clearly not warfare but deliberate targeting of the whole population in addition to ethnic cleansing/genocide, so in an entirely different category to assess.