Again, your conflating issues. It’s obvious to any one with a brain that Japan attacking PH wasn’t going to be “ignored”. Speaking strictly hypothetically, it could have been since Japan interests were to keep the US fleet from interfering in it’s sphere of operations, not as  prelude to invasion of the continent, or even Hawaii. However, as we both know that wasn’t going to happen and Japan would need to be destroyed. To repeat, our civil rights were never in direct jeopardy from Japan, only from our reaction to their acts. It wasn’t necessary to intern loyal JA’s, many of whom fought with honor when given the chance. And “our Territory” you refer to is the result of maintaining an empire( ala Japan).
Re: Britain falling, hardly likely given American support, loss of air war and Russia beating the snot out of Germany. It's  fair bet the Russian steamroller would have devoured Germany long before any ICBMs(or nukes ) would have been built.