(The Palestinian terrorist regime is the crisis and Israel's fist is the answer.)
C'mon, Israel does not need to use chemical weapons. It is doing the right thing right now. It it taking no crap. It demands quiet for quiet in lieu of peace, and it will reply harshly and smartly to frustrate its foes.
"The world" has not acted strongly enough to keep the terrorists at bay. Israel cannot be asked to tolerate attacks any longer, especially since it has withdrawn from Gaza and wants to withdraw from much of the west bank.
The terrorists are opening a new front (an old front which they are now reopening). They don't want Israel to withdraw, and take away the only thing they have to complain about. They think they can force the US out of Iraq by widening conflict and turning opinion against the US and Israel.
The terrorists need to be attacked directly, and pressure must be brought down on those who harbor them. That means harming Lebanon's economic interests, strategic assets etc until it does something to stop attacks. That means pressuring the Palestinians to put Hamas down. That means, possibly, attacks on Syria.
I think Israel should try to harm Syria by flooding it with counterfeit cash.