Number one whitest state in the country too.
https://www.roadsnacks.net/whitest-states-in-america/
But it would be "racist" to say that's the reason their crime is so low, so I won't say that.
Too late, your bigotry was obvious.
Maybe because the State of Main is rural and I suspect one trooper covers several hundred sq. miles at night. That suggests many rural home owners are armed; how many do you think have a high velocity long gun with 30 round magazines?
I suspect a shotgun with a modified choke would suit a rural home owner in Maine, likely in most urban cities too.