'Death Ground' is basically territory that cannot be retreated from, in any direction, cannot be abandoned, due to physical/terrain constraints, or I think serious strategic necessity, like uh, you can't retreat from where all your army's food is.

The idea is you never want to fight people who have no option but to fight to the death, because they will fight fiercely.

You always want to give them an option to runaway, don't block all their possible escape routes.

... ICE is treated the Twin Cities like Fallujah, and this is literally the home of everyone who lives there.

Beyond the moral atrocity and PR nightmare of what they are doing... they're just actually being strategically incompetent at this point.

... The only way what they are doing maybe strategically makes any sense is if they assume they can literally kill or imprison everyone in the country who would resist them, that they have the resources and manpower to be able to do that.

Even viewing their whole campaign as an occupation of hostile territory... you can't win that in the long run with the kinds of 'tactics' they are using, we learned that the hard way, most recently in Iraq and Afghanistan, but also Vietnam, many other examples.

Oh and of course there's the problem that if your campaign is in your own territory... you're destroying your own economic basis for a sustained campaign.