Do Nuclear Weapons Really Deter Aggression?

Conspicuously absent in this type discussion is a land mass identified by state lovers as "Switzerland". The governing agency there is nondescript by most standards, (weak "central government"). Adults -- both male and female, I think -- are encouraged to be armed to the teeth and to have ongoing training in whetting their skills in the use of those firearms. There seems to be a "law" to that effect, but I rather question its enforceability due to weak or nonexistent governing "powers".

Switzerland, as I understand it, has an extremely low "crime rate", and is never attacked by anybody. I suspect it is for the same reason I refrain from attacking nests of rattle snakes and yellow jackets.

Sam