Like JD, my family is European. Street crime there is a tad different than here -- let's be real: there are just more guns here in the States. Never felt as though I needed a weapon in Finland, the UK or Germany, although I had an negative experience once in Naples (Bella Napoli!) Italy, passed through Sicily and was there when the Mafia killed a judge ... Felt pretty secure in France (even though one time, it was summer and the garbagemen were on strike), spent time in Spain when some stuff was goin' on, always wished I could carry in Israel ...
Always felt pretty secure just going with situational awareness, staying out of bad areas, using common sense and understanding that if you want to travel the world as a civilian, in most places, yep, you're gonna be armed only with your wits ...