Israeli civilians have been brainwashed to believe the world is out to destroy them, enforced successfully by Israeli governments. Israeli leaders ( and some civilians) on the other hand are just greedy for Eretz Israel and will anything to obtain it. The hysteria comes from trying to cover their tracks and fend off international pressure.
Gunmen in Egypt kill guard outside Niger embassy (Reuters)
from the article: Netanyahu: Israel will not allow flotilla to breach Gaza naval blockade