In World War II, the Japanese were not afraid of death. The sent Kamikazis (World War II version of suicide bombers) by the many thousands, even tens of thosuands, against allied soldiers, ships, buildings, etc. The people committed mass suicide rather than be occupied (Okinanwa). It was religious to them and it was engrained into their culture over many hundreds and hundreds of years.
And yet they were defeated...and they were defeated by shear dissproportionate allied (mainly American) attacks on their military forces and on their cities and population centers. Fire bombing Tokyo and other cities, nuclear bombing Hiroshima and Nagasaki.
The fact is, these dissproportionate attacks ultimately wore the enemy down and saved hundreds of thosuands of allied lives, and probably millions of Japanese lives because they ultimately surrendered unconditionally.
The same thing happened against the fanatic Nazis...but they were not as suicidal as the Japanese.
Isreal, IMHO rightly, is calculating that it will utlimately have to be the Palestinian people themselves who depose organizations like Hamas. They also understand that the Islamic culture, particularly the fundamental, radical Jihad culture, is not going to be easy to wear down, nor will it be done quickly or sporadically. But wearing it down to the point that those people reject people like Hamas is the only thing that will work against people, particularly the terrorist fighters, who are not afraid of death, like the Japanese were.
Very horrible..very difficult...but also something that tragically has to be done if Israel is ever to have peace. And it is going to take time, and it is not going to be pretty no matter how we or anyone else tries to dissect it.