> In the Court’s opinion, they noted Section 1155 as an absolute confirmation of discretion

Discretion by the Congress on the President. Congress is still bound by the Constitution.

If they’d cancelled the visas and left the reason blank, that would have probably been legal. By explicitly tying the reason to speech, however, I believe it crosses the line.

Nope. The 1st Amendment (as currently interpreted at least) doesn't protect non-citizens against deportation. See Harisiades v. Shaughnessy

Everything surrounding immigration is a giant gaping hole in the Constitution. The gestapo stops people up to 100 miles from the border, with no probable cause or articulated suspicion that they are even non citizens. Systematically. CBP holds even citizens for basically as long as they like ( yes technically there is some vague directive it be speedy but I can tell you first hand if you ask for a lawyer they'll tell you to get fucked; they take your communication devices too, you have no way to object or record it for evidence).

I think most people don't know HSI is practically as big(ger?) as the FBI, they and CBP goons served as a sort of presidential army rolling into places like Portland taking people in unmarked vans [0].

https://www.npr.org/2020/07/17/892277592/federal-officers-us...

The entire shoreline of the Great Lakes counts as an international border, so literally 100% of Michigan is in the CBP special enforcement zone, and Chicago is basically the same as San Diego or El Paso.

I think international airports can also be considered borders, but maybe the range around them is less?