The courts haven't allowed many of the high-profile deportation of non-citizens that have occurred recently, including the single one that is getting the most attention, having both issued orders in advance and after the fact, to, as yet, absolutely no substantive effect on executive branch behavior.

So, while other things may be debatable, what is not debatable is the clear fact that "the courts won't allow it" is not sufficient to establish "it will not happen".