That is nonsense.
The Supreme Court said otherwise.
"All persons residing within this territory whose property may be used to increase the revenues of the hostile power are, in this contest, liable to be treated as enemies, though not foreigners. They have cast off their allegiance and made war on their Government, and are none the less enemies because they are traitors."
Walt
The Supreme Court has been known to utter nonsense; admittedly they don't do so as consistently as you do.