I have a friend from college whose family has been in Hawaii since the 1850s. Much like the George Clooney movie “The Descendants.”
Grandad owned a house on Oahu, on the eastern side of Pearl Harbor. They had a Japanese gardener working for them for quite some years.
On December 7, 1941, the gardener disappeared, never to be seen again. At the time, the FBI did their interviews and investigations, but never said what they thought happened to him....
If one gardener can provide enemy intel, imagine what 1 million potential terrorists crossing the border can do in a few years.
I take it you think the gardener was a spy? Alternatively, after that day, he thought be a Japanese person in viewing distance of Pearl Harbor was not a good idea. Think about it.