As was the case with the idea that these people aren't entitled to due process at all.
Yeah, but that was just a rhetorical distinction, not a substantive one.
Like the other day, when Phoenix told you that immigration judges are a totally separate thing, they aren't part of the judiciary at all, and you were just like "well, I didn't know that, the US is worse than I thought." No, it isn't, you just don't know anything. You imagine due process as some uniform thing, but what process people are due varies tremendously depending on the action. Most importantly, you view deportation as though it is a punishment, and while sometimes it is treated as such, that's not the case.
Consider a theft. The thief takes something from you, gets caught, and you get your stuff back. (inb4 Seanchaidh complains about police keeping stolen property for themselves). You getting your property back is not punishment. If they go to jail, that would be the punishment, but giving your stuff back to you is independent of that, and independent of even a conviction. If it's like a car, and the title is in your name, and you didn't give it away and you want it back, you getting the car back is an aspect of justice in the abstract sense of it, but it is not an action of criminal justice requiring them to be convicted by a jury.
Similarly, consider trespassing. If someone is trespassing on private property, you don't need to go through the whole legal process prior to removing them from the premises. If you want to jail or fine them for trespassing, they are entitled to a diligent process of law. The process for removing trespassers, however, is the owner tells them to leave and they don't, then the police tell them to leave and they don't, then the police physically remove them. There's not warrants or judges or juries involved in that process, the maximum they are due is a chance to rectify the situation by leaving on their own.
In your mind, you obviously see deportation as a punishment that deserves the full consideration of the judicial system. You view it as though the country doing the deporting is declaring the deportees the most heinous of criminals to be punished by exile. But that isn't it. They're not supposed to be here. It's not jailing the car thief, it's giving the car back. It's not fining the trespasser, it's removing them from the property. It's not enacting punishment, it is reestablishing the legally valid status quo, and the due process for doing so is, for good reasons, tremendously less than for the enactment of punishments.
And if you stop thinking about the US (the imaginary hellscape in your mind that has little connection to reality) and consider any other nation, I guarantee you can understand this.