There is a big difference in having an old, nutty, hard to get along with neighbor (I have one) and a neighbor that threatens physical violence.
Tell your family. If he is truly a threat, they are in danger as well. Tell your family. Discuss your options as a family.
Hondo Von Dopplet L Bauernhof "Hondo"- GSD
Lilie's Tug McGraw "Tug" - Golden Retriever
Maggie - Mini Dachshund (Rescue)
Lonestar Pivo - Texas Blue Lacy
Ashe - Barn Cat
Katie / APHA