"Who thinks that our constitutional rights extend to persons not US citizens and not living in the US?"
They Don't
For that matter who thinks our constitutional rights extend to US citizens that are currently living or traveling in another country?
One has to abide by the laws of the Country they are residing or traveling in.
In particular Free Speech,assembly, self incrimination,trial by jury,unreasonable searches and seizures,and speedy trial.
these all apply to the laws of that said country...
Hog