I find pre-war sentiment to be a bit of a curiosity. Listening to my dad, he has fondly said that he and his schoolmates really wanted to fight Hitler. Given what he had to do to join the Army, I think he's right...and that's a very different image than the isolationist description I'd later read about. I wonder sometimes about the sentiments before the war and how many people held what view. My dad may not have been in the majority, but I certainly don't think he was alone in his thoughts either. Someday I'll spend some quality time in the library going through some old newspapers. In my copious free time.
Couple of thoughts...
Public opinions change, sometimes overnight. Pearl Harbor changed a lot of perceptions, the same way 9/11 did. US sentiment in 1938 was very different from US sentiment in 1942.
People don't always remember what they remember. They remember what they want most to remember. With no disrespect intended towards your relatives who remembered champing at the bit to go fight Hitler.
1938:
http://books.google.com/books?id=bk...AEwAg#v=onepage&q=america germany war&f=false
http://books.google.com/books?id=EU...AEwBA#v=onepage&q=america germany war&f=false
1941:
http://books.google.com/books?id=FE...AEwAg#v=onepage&q=america germany war&f=false
1942:
http://books.google.com/books?id=K0...AEwAg#v=onepage&q=america germany war&f=false
http://books.google.com/books?id=QU...AEwAQ#v=onepage&q=america germany war&f=false
From what I have read, public sentiment was slowly shifting away from isolationism towards approval of going to war on the side of the Allies, then Pearl Harbor happened, Germany declared war on us, and that was pretty much the end of any public sentiment towards peace. In a rather short period of time, people who publicly expressed a desire that America remain neutral were labeled 'traitors', despite the fact that only a few months before, it was the majority of the nation that felt that way.