Plus it was luck that Italians and Germans could change their names and fit in. Meanwhile, Japanese could not do that. Here on Long Island, Nazism was blatant and out in the open. In fact they are STILL there waaaaaaaay out east.
Germans and Italians composed 56% of those 'enemy aliens' interned during WWII.
However, only those of Japanese ethnicity were subject to relocation.
Fascinating. Distant echos of the Yaphank summer camp that the Bund operated in the 30's.