NATO membership would not matter much, because the geographic scope of NATO is limited. For example, if someone invaded Hawaii or French Guiana, or if Morocco tried to annex Ceuta, it would not be an attack against NATO.
The limitation was intentional. Many of the founding members were failing colonial empires, and nobody wanted to be drawn into someone else's colonial wars.
The limitation was intentional. Many of the founding members were failing colonial empires, and nobody wanted to be drawn into someone else's colonial wars.