This is fascinating to me (and seriously makes me question my mind set). Do you not have crime there? Or is it more of the petty variety? I don’t live in fear and don’t own a gun but I do feel I have to make myself more aware. I do feel like it’s possible to be a victim of crime here.
Of course we have crime, we are not better than any other country. But it's really a mindset about weapons.
For example the last few years more jewellery stores get robbed, and some more than once. Also more high profile people, celebrities and such get robbed at home or on the street (mainly targetting expensive watches and jewellery).
The advice here is: When you get robbed give the thief what he wants and call the police. When you see an incident, they advise you to film / remember details, we are never advised to intervene or use violence ourselves.
In the Netherlands there are about 400 street robberies in a year, and about 400 at home (although you do not have to be at home for this). Relatively most in big cities, of course.
We do have a problem with young people/minors and knives. Knives are available everywhere. Government is currently working on a law regarding carrying knives.
In the meantime we have programs to hand in your weapons without being prosecuted. It doesn't solve everything, but every weapon of the streets makes our lives saver.
There are plenty of kids here who do not get help or are hard to reach. Especially among minority groups. There are all kinds of programs trying to work with the community to reach these kids.
I had a look how to get a gun in the Netherlands (legally)
Most importantly, you need to have a good reason and for everything you need to be a member of a club or society to proof that you need it. Like for sports, re-enactment, collection etc. Also think vets who need tranquilizer guns, people in charge of wildlife who sometimes have to kill animals for the balance in nature.
Self-protection is not on this list.
Besides this you cannot be convicted, you need to give 3 references as part of your background check and they will check your home to see if you can store it properly.
But this doesn't tell you anything about how to get a gun illegally. That's all about knowing the right people (so Google tells me). Telegram is usually a good start.
I am sure there are plenty of illegal guns in the Netherlands.