Because, despite there being citizens of both German-American during WW2, they knew that there was a low risk of these people (of course there were also those for which they suspected might be secret spies) being accomplices of the Third reich. A lot of these people were also scientists who fled the atrocities of hte Nazi regime before the war.
Answer:
In early revolutionary times, Adams was among the most vocal and radical critics of the existing government. By the 1780s, however, Adams had become an establishment figure and urged death sentences for the leading Shays rebels. Abigail Adams also had no compunctions with regard to the rebels.
Most likely Britain as it is a major country with a economic policy and trade agreements that are the backbone of the European economy.
