I think, that each country that was either attacked or invaded by Germany in the WWII won't let it happend again.
I think we'll (Yes, Denmark was one of them..) fight to our last men.
My grandpa' was a "Freedom Frigter".. a rebelion you might say, who fought against the Germans, many of his friends at that time got caught and he's never ever heard of them again.
My mom's grandpa' was taken to a KZ Camp, he told us about many of the horrows that went on in those camps.
I know no humanbeing (I hope) could and/or would let something like KZ Camps happend again, but our last experiences in WWII have left us marked, a mark that made us more nationalists than ever before.
If it comes down to a 4th Reich, we WILL fight back.
(I don't judge anyone, 'cause I know that all the Germans (except those Nazi-groups) are forever embarresed and sorry for what one single humanbeing could do to Europe.)