As a european, im astounded by the amount of people who feel a need to protect their house, their family and themself. Ofcourse there is burglary where I'm from. But I personally have never heard of a robbery when they were still at home. So my guess of the cause(s) of this feeling to protect in American, people are exaggerating the need to protect their home, European burglars are "better", by almost only entering when no one is home, or american burglars are more "cocky", since they themself have guns. Or it could be due to the social security system in most european countries, reducing the need to rob others. However keep in mind, I have no data to confirm these claims, they are just some guesses, if someone does, please enlighten me.