I don't understand your question. Mass shootings seem to be more rare in e.g. Europe. But how does that help anything?
"You had Norway last year [where 77 died]. Two years ago, you had the shooting in Austria at a Sikh Temple. There have been several multiple-victim public shootings in France over the last couple of years. Over the last decade, you’ve had a couple of big school shootings in Germany."
http://www.newsmax.com/Headline/Lott-guns-Connecticut-shooti...
History indicates otherwise.
I guess I just don't have the "sophisticated" European point of view that says that millions killed by government don't count.
In addition to the wars per se, European governments have killed millions of their own citizens, and they've been at it for centuries.