Your supposition fails. Israel vets everyone that enters the country and erected a wall to make sure of that.
Try your fail again.
Okday, let's this scenario then. It's pre-9/11. Hard to imagine now but there was such a time. You're flying out of D/FW and seated next to you is that muzzie family from Irving, Mohamed Elhassan Mohamed and his kid. Young Ahmed opens his school bag and you see a device that looks like the "invention" shown in the newspaper's site video. How would you react?