interpreters-refused-for-deaf-non-americans

Are Americans in the habit of refusing interpreters
for deaf foreigners (because technically they are
not covered by ADA)? A while ago a Canadian
deaf woman was denied interpreter for her classes
at University of California (Berkeley). And now
this – a deaf Japanese woman, having problems with
the airport personnel in Hawaii, wanted an interpreter.
Her request was denied. Are Americans selfish about
not lending interpreters for foreign deaf?