1. A normal friend takes a few self-defense lessons for fun.
An Israeli friend actually kicks your ass with Krav Maga.
2. When your normal friend wants to see you, he will call or text to schedule a time and place.
When an Israeli friend wants to see you, he will just pop over in the middle of the night with some Cola, Pizuhim, and Bamba.
3. A normal friend introduces himself by stating his job or where he comes from.
An Israeli friend introduces himself by stating which military unit he served in.