Much of Europe was actually, antisemitism has always been strong across western European countries like France, Spain, and (at the time it was still considered one) the UK. And appeasement was an appealing option that most countries were in support of right up until the moment that the Nazis were in their borders blowing things up. The idea that the Allies had always opposed Nazi Germany - and especially that they did so for moral and ethical reasons - is one of the biggest white washing propaganda programs in modern history.

America holds the special distinction of being the only country besides Germany to hold a Nazi convention, though, and we did almost join the war on their side a couple of times while we were also funneling money and arms to various other nations in Europe.