According to the paper, Ben-Gvir presented a plan to build 5,000 new detention centres (…)
(from article)
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It might be more cost effective to ship the POWs and detainees to jihadi funding nations like Turkiye, Iran, Qatar, etc.. Of course, it would be humane to also send their families so they can stay. In this way the jihadis and their families less tempted to carry out actions that would result in them being injured or even martyred.