After catching up a bit more yesterday evening, it appears the point I was raising is correct. And not one y'all are talking about, that I can tell.
If I'm understanding correctly, bayareabadger et al are talking about due process, including that which extends to non-citizens. Fair.
What this administration is contending is its powers under the aliens enemy act, which is a separate thing. This is what detractors should be contesting, because everything else they're talking about does not apply.
I've almost finished reading the act, and I was able to find and read the SCOTUS opinion I mentioned earlier. Indeed, if this act applies, looks to me like SCOTUS has already clearly sided with the executive branch's authority to do this. When I'm finished with the act itself hopefully I'll have a better opinion of whether it applies.
(My opinion would be worth what you paid for it. I ain't a lawyer.)
So far, I see what the administration is saying. The language triggering the power about only needing an "incursion" seems broad and I can see it here. IMO, if that remains my stance, then it seems the detractors should set about advocating for an update to that act so it couldn't be used in that way, if that's the way they see it. Because in that case, it would more be a matter of people who don't like the law rather than the executive branch breaking the law.
Incidentally, I noticed Chief Justice Roberts yesterday rebuked the idea of impeaching this judge, or other judges for stuff like this, and encouraged congressional members to settle down, because that's not how we deal with doofus judges. Also, there's nowhere near the votes to impeach, but I'm more interested in his take on principal.