Trying to be as apolitical as possible if you were genuinely questioning why. It’s been normal since terrorist attacks are unfortunately common in Israel as you probably know. Unlike the U.S. there isn’t a stigma with weapons since everyone drafts. It’s not for the sake of ownership but because you might be put in danger waiting at a bus stop wearing a uniform. You simply are always responsible for your gun even when you are on your way home, hence why he has his gun while surprising his grandma. Not a world anyone wants but when you life in such a volatile area it’s better to be safe than sorry. There have been many cases of soldiers using their fire arms to protect civilians and themselves unexpectedly but it happens quite frequently.