300,000-500,000 Israelis were displaced in the war.
http://en.wikipedia.org/wiki/2006_Lebanon_War
I witnessed the Eastern Galilee being largely empty of human Jewish life.
People were not walking in streets but most did not left.
Most of Hizbollah's rockets were 5kg "firecracker' katyushas, were still plenty loud enough. The crump of 30kg Fajrs up to 400kg Zelzals landing in Gush Dan will be a different ball game.
Hezbollah did not fire any "Katyushas". They fired Grad missiles with 22 kg warheads.
Day One - In a massive coordinated attack, some 6,000 missiles hit the Tel Aviv area, knocking out much of the military's operating and intelligence networks. Hundreds die in the rubble. The survivors are in panic. The Israeli government has left the country before the airport is overwhelmed first by terrified civilians, then by the enemy.
1) Hezbollah cant fire 6000 missiles in one day, not even close. If they try very very hard thay can fire 600 short range missiles and dozen of long range.
2) Hezbollah rokets dont have enough accuracy to damange infrastructures, especialy military networks.
Day Two - Another 6,000 missiles are shot throughout the country, knocking out electricity and isolating army units into pockets, defeatable by anti-tank missiles. They are first attacked by the Palestinians and their missiles, then Israeli Arabs, then Arabs from everywhere.
1) They wont be able to fire 6000 missiles, not even 600.
2) During the Yom Kippur war, Israeli forces in Deversour fought under barrage of 2000 artillery pieces, tens of thousands of shells a day. Rockets are much less accurate than artillery shells and hardly can cause much damage to army.
Day Three - Syria enters the war and fires 10,000 rockets on its first day. Israel is now in sheer chaos; it has all broken down. In East Jerusalem, 140,000 Arabs march to the Jewish West. They have burned the Jewish Quarter of the Old City and are now streaming out from every gate. Many Jews run to the forests, but they'll die of thirst if they manage to evade capture and fatal abuse. The Western Wall is destroyed with its rabbis and worshipers forced to watch. They are led away in tears. None is ever seen again. With the enemy coordinated and Israel without a chain of command, the nation has already disappeared. The enemy first takes over isolated settlements, breaking their defenses and their wills. The men are hunted down. They are gathered together to watch their wives and children raped. Anyone who dares turn his eyes away is shot, if he's lucky, fatally. Those who survive will soon dangle from the nearest meat hooks or other useful slow death apparati.
There is no any chaos in Israel. IDF is fully mobilized. 6-7 divisions are preparing or already entering Lebanon. 2-3 divisions are on alert on Golan. 1 division near Gaza, 1 division + Kfir Brigade + Magav in Yosh. IAF destroyed ports and bridges in Lebanon, leveling Dahya, bombing South and Baalbek.
I doubt looking at leveled Dahya Assad will decide to enter the war. But if he enters he cant do much. His airforce almost does not exist. Tanks are old and rusty and cant do anything against Israeli Merkavas. His rockets are not accurate and cant cause much harm to the army. If he fires at towns then It will give Israel free hand to level all objects in Syria.
Day Four - Word is out in Damascus, Cairo, Amman, and throughout the Middle East, that Israel is for the taking. The Zionist leaders were ready for flight and were gone. The people were left behind to be slaughtered. Syrian soldiers were now flushing "proud" Jewish soldiers out of the isolated IDF camps. Many of these soldiers were not going to fight to the end. They left the camps with their hands in the air, totally defeated. In the cities and towns, Israelis walked down shattered streets, looking for safety. There was none. It was better to be old and ugly and maybe get shot. For the attractive ladies dressed in top brands, death never came quickly enough. The lovely ladies of Judaism were mass raped, left to consider their fate in the ruins of their homes and then, maybe, shot only once through the head.
Day four. IDF captures 20 km strip in Lebanon, continues massive bombings. Arabs cry about Israeli cruelty and beg for cease fire.