Official line of Hamas is that you have to kill all israeli jews they encounter on sight — even if it means making a suicide attack. Kids in kindergarden play through scenes of stabbing, kidnappings and suicide bombings. And despite Israel's security measures, this happens (inside Israel borders, not in Gaza) almost weekly.

So, if unarmed israeli would find himself on his own in Gaza, we would have a full-fledged security crisis which would probably lead to the next war (because the dude most likely would be killed) instead of a hackathon.