See in particular his quote from Scalia's dissent in Boumediene:
“The alien, to whom the United States has been traditionally hospitable, has been accorded a generous and ascending scale of rights as he increases his identity with our society . . . .
“But, in extending constitutional protections beyond the citizenry, the Court has been at pains to point out that it was the alien’s presence within its territorial jurisdiction that gave the Judiciary power to act.” Id., at 770–771.
Not even Glen Greenwald claims that the U.S. Constitution applies to non-citizens trying to board a plane in Cairo.
See in particular his quote from Scalia's dissent in Boumediene:
“The alien, to whom the United States has been traditionally hospitable, has been accorded a generous and ascending scale of rights as he increases his identity with our society . . . .
“But, in extending constitutional protections beyond the citizenry, the Court has been at pains to point out that it was the alien’s presence within its territorial jurisdiction that gave the Judiciary power to act.” Id., at 770–771.
Not even Glen Greenwald claims that the U.S. Constitution applies to non-citizens trying to board a plane in Cairo.