Tell that to Switzerland which have forth highest gun ownership and one of the lowest gun violence. Cyprus, Sweden, Norway etc. There isn't a clear cut more guns -> more gun violence.
Your theory doesn't hold up. Which is not a surprise in this topic none of your claims hold up.
Funny you should mention it. Stockholm, Malmo, it's downtown Bagdad. I put a Breibart link in just for you. Just the other day a guy was gunned down at a bus stop.
http://www.thelocal.se/20151102/stockholm-worst-nordic-city-for-gun-crime
http://www.breitbart.com/london/2015/11/02/gun-crime-just-one-swedish-city-higher-nordic-nations-combined/
http://www.express.co.uk/news/world/753697/Malmo-shooting-Teenager-killed-Swedish-no-go-zone
But that's just gang violence, surely everything will be fine once every law biding citizen has a gun too.