JERUSALEM Hamas, judging by its rhetoric and suicide bombers, is not afraid of death.
Judging by its policies, Hamas is also not afraid of causing the death or suffering of fellow Palestinians. And Hamas is definitely not afraid of killing Jews.
What Hamas is afraid of, however, is losing power; losing control of the Gaza Strip, losing its base of Islamic fundamentalism in this little corner of the Middle East.
That fear and the appreciation in Israel of the importance of power to Hamas explains some of Israels actions over the last few days in the Gaza Strip.
Shin Bet (Israel Security Agency) head Yuval Diskin told the security cabinet last week that Hamass ability to govern Gaza has been significantly impaired.
That, it appears, is one of the key tactical goals of the military actions of the last few days.
Operation Cast Lead began Dec. 27 with an attack on training bases and command and control centers, the symbols of the Islamist organizations iron grip on the Strips 1.4 million people.
It also included an attack on a graduation ceremony for a class of Hamas police cadets.
While the assessment in Jerusalem is that Hamass military wing has to a large extent survived the initial onslaught, albeit a bit bruised, the police have taken a mighty blow.
That is significant, because it is through the police that Hamas has been able to enforce order in the Gaza Strip.
Order is important if you want to rule.
On the second day, the IDF targeted the smuggling tunnels from Sinai into Gaza, tunnels that not only are used to bring in missiles and explosives, but also goods and cash that the residents of the Gaza Strip have come to rely on.
The third day was marked by attacks on the Islamic University, and on the homes of Hamas leaders and the symbols of power.
The fourth day was marked by a destruction of Hamas government offices.
Israel is going after the trappings of governance, of power, of control, of rule. The reason is the belief that the force that may eventually sweep Hamas from power is not PA President Mahmoud Abbas and Fatah, but pure anarchy.
If Hamas cannot rule, if it cannot provide the people with what they need, if the leaders are in hiding, if anarchy reigns, then Hamass legitimacy is delivered a major blow.
This, to a large degree, explains Israels targets. Jerusalem wants to hit Hamass ability to rule, it wants to encourage anarchy that would threaten the organization.
Israels opening of the Gaza crossings to allow in humanitarian aid contributes somewhat to this sense of anarchy, because it makes Hamas look unable to govern.
If the Palestinians must rely on Israels green light to let food aid in from third countries, then that undercuts Hamass argument that it is able to serve its public.
But it is not only Hamas that is afraid of losing its valuable toehold so is Iran.
Hamas has achieved something in Gaza that Hezbollah has yet to attain in Lebanon: complete control, the unimpeded rule of the Islamic fundamentalists.
Its a great base, a great jumping-off point, for further designs both on Israel and on Egypt.
Special attention should be paid to statements coming out of Tehran these days, because it may be possible to see signals in them of when Hamas might be on the verge of crying uncle.
When Iran gets increasingly hysterical about the need for international intervention to stop the bloodshed, it is a sign that it is worried that its client is about to lose its grip on Gaza something against Teherans interests.
In the year-and-a-half that Hamas has controlled Gaza, the organization has tried to create the impression that it is not a gang, not a terrorist organization, but a responsible party, the head of a regime able to govern, able to maintain law and order and to provide essential services.
When Hamas loses its ability to do this, when it loses its control of the situation, when its loses its grip on Gaza, then its legitimacy may be diminished in the eyes of its own people.
Palestinian apologists have argued since the elections that brought Hamas to power in 2006 that the Palestinian people did not really buy into Hamass extremist ideology, that they didnt really want a Hamas government, but were just fed up with Fatahs corruption and ineffectiveness, and voted for Hamas because they wanted a government that could rule.
But Israel seems now to be betting that if Hamas can no longer govern effectively, then its public legitimacy may wane.
That, Jerusalem believes, is something that genuinely scares Hamas.
Israel is trying to push that process along, a major reason why one of the few morsels thrown to the press from the security cabinet meeting last week was Diskins assessment that Hamass control, its ability to govern, was hit and hit very hard.