The murder rate in the USA is 5.3. In both the UK and Denmark (the countries I've lived) it's 1.2. Furthermore, the general feeling in society in both countries is that murder victims are criminals (drug dealers etc) or relatives/friends with the murderer (domestic violence, arguments). This is backed up at least by the British statistics [1] "furtherance of theft or gain accounted for 7% of homicides" "among suspects: 42% were known to be drug users and around a quarter (24%) were known to be drug dealers".
I've never known anyone who was murdered. I've never heard anyone speak of someone they know being murdered.
The burglary rate is higher, but a camera system probably isn't much of a deterrent.
> basic gun ownership
(1) Run away, (2) Hide, (3) Call 112?
[1] https://www.ons.gov.uk/peoplepopulationandcommunity/crimeand...