It's a statement by a UN official.
This is not the same as an official UN statement. I'm not trying to be difficult, it's just the opinion of one man does not compare to the official opinion of one of the few respectable bodies in existence.

Ong, this is not disputed.
As mojo points out, I'm disputing whether kids in US camps are being treated like prisoners of war. The whole "separating families" issue is a subjective issue. Either you don't have a problem with adults who attempt to cross borders illegally being treated like criminals, or you do.

If they're deliberately not keeping records as a deterrent, yes I agree that's disgusting and amounts to human rights abuse. I would expect the UN to have something official to say about that, in the form of a statement, not a lone guy speaking out. Who knows what motivated that guy? Maybe it was his conscience, maybe it was a shady handshake. Politics is murky business.

Playing football is not a budget concern. It's as cheap as it gets. These kids are obviously supervised round the clock, what difference does it make if they are supervised inside or outside? How much does a football cost, and some goalposts? How much does a basketball and hoops cost? Less than the damage a bunch of bored kids will cause if they are left inside with nothing to do.

It's not a budget concern. If it's happening, if they are not being allowed to engage in activities, then it is nothing more than a punishment.