But anyone should be in a foreign country. If you go taking pictures of national security sensitive places you shouldn’t be surprised if you are shooed off or possibly detained depending on what exactly it is.

This is conflating two issues though. Simply existing in a foreign country should not be suspicious. Obviously taking pictures of security sensitive places is, but that would be the case for a natural-born citizen as well.

Edit to add: I didn’t bring up internment camps to imply this would lead to that, simply that the same exact sentiment is seen in both cases. How that sentiment is reacted to can be different. It’s also worth nothing the “they should be eradicated” message, which I’ve seen echoed a lot about Russia, just as it is used here against Japan(ese).