It was more than just the Jews.
72 million souls perished in WWII, the majority of whom were Europeans.
And if you turn the clock back to WWI, an entire generation was almost literally wiped out in that war as well.
The Europeans have the Europeans to thank for their severe demographical problems.
http://en.wikipedia.org/wiki/World_War_II_casualties
A very good chart of all losses in WWII can be found here.