Yep, Nazi Germany was NEVER a threat to America...until they would have consolidated Europe and Russia.
If Germany didn't have the ablitity to subdue England in it's darkest hour, they couldn't manage a cross channel invasion, then there is no way they could have handled a cross Atlantic invasion. They didn't have long range bombers, fighters or aircraft carriers or a sizable enough navy. Germany posed no threat to the US and like the man said Hitler wanted the world divided into spheres of influence. Germany in Europe, the US in the west, England would have had its far flung colonies and Japan the east. FDR wanted the world divided into spheres of influence also - just a different version of powers and spoils. That shaped up jsut the way FDR wanted after the war.
If you believe Germany threatened us, you've been suckered by propaganda.
P.S. when you go to bed tonight be sure to check under the bed for boogiemen first (sorry for the cheap sarcasim, I couldn't resist).