I support  the Palestinians returning that young 19-year old soldier.  If they refuse to do that, then the Israelis have no choice.

The Palestinian authority can prevent an attack in Gaza.  If they don't return that soldier, then Israel has every right to go in and find that kid.  While they're there, they might as well destroy Hamas's capacity to attack them.
Israelis took a very courageous step in unilaterally disengaging from Gaza.  One would have thought that the Palestinians would have used that opportunity to demonstrate that they are capable of self-governance.  Instead, they have launched over 1,000 Quassam rockets to Israel and have demonstrated themselves to be incapable at this time of creating a state for the Palestinian people.