Is Gaza fighting simply fueling future violence?

GAZA CITY, Gaza Strip - Israel and Hamas agreed late Thursday to a humanitarian cease-fire in the war in Gaza, beginning Friday and lasting 72 hours.

The Israelis and the Palestinians will also send delegations to Egypt to negotiate a more lasting truce. But Israeli troops in Gaza will remain in place and continue efforts to wipe out the tunnels that Hamas uses to attack Israel.

In a virtual declaration of victory, the chief of Israeli forces said they are a few days away from destroying almost all the Hamas tunnels.

There was no doubt that Israel would win the military part of this war.

Now in Gaza, the question is the mental wounds that will emerge after the bombs stop falling.

"I call it psychological massacre cases," said Gaza psychologist Sami Owaida. "There will be shock."

Owaida has a grim prediction -- made as bombs fell nearby -- for how the shell-shocked and depressed with cope.

"You commit suicide and you die or you will stay alive just to get revenge for your families who were killed," he said.

Emran Krayka, a 15-year-old Palestinian boy, says he wants to be a suicide bomber to wreak revenge on Israel. CBS News

Revenge brings us to Emran Krayka, an outgoing 15-year-old who likes tennis and computers. His bombed-out family now lives under blankets on a sidewalk.

They are among what some now estimate as many as 400,000 internal refugees.

"The Israelis teach their children," he said, "that we will kill them, so they take revenge on us."

This war has inspired his new ambition, which he shares with chilling calm.

"I will be a suicide bomber," he said. "I will blow myself up in Israel."

From the angry mind of a teenager, a glimpse into the seeds of hatred sowed in one war that may well fuel the next one.

The Palestinians estimate that more than 40 percent of the population in the Gaza Strip is under 15. Or to put it another way, a lot of kids here are at the same impressionable age as Emran - making them prime targets for recruiting by Hamas.