The correct answer is that the bombing of Pearl Harbor in 1941 by Japan made American isolationists quickly change their tune as America was under attack. Once Germany declared war on the US, the US was fully into the war.
Answer:
Nativism is the political policy of promoting the interests of native inhabitants against those of immigrants,[1] including the support of immigration-restriction measures.[2]
In scholarly studies, nativism is a standard technical term, although those who hold this political view do not typically accept the label. Oezguer Dindar wrote, "[N]ativists [...] do not consider themselves [to be] nativists. For them it is a negative term and they rather consider themselves as 'Patriots'.[3]
It was originally named Samhain. I hope this helps!
:))