This item is very portentious; Hamas seems to have taken over the Gaza Strip:

Many senior Palestinian Authority security officials in the Gaza Strip have gone underground, fearing retaliatory attacks from Hamas activists following two days of clashes.
"Commanders of PA security forces are afraid to sleep in their homes," sources in the Gaza Strip said. "Many of them have stopped showing up at work."
..."Today the PA's power is effectively restricted to some neighborhoods in Gaza City," explained an academic living in Gaza's Sheikh Radwan neighborhood. "The fact that the colonel was kidnapped from this neighborhood is a slap in Arafat's face."
"Arafat has to face the fact that his forces have lost control over the majority of the Gaza Strip," said the Gaza academic. "The people here have more sympathy for Hamas and Islamic Jihad, because they believe they are their authentic representatives."
On Monday, a furious Arafat issued instructions to send 3,000 policemen to arrest suspects in the officer's murder at Nusseirat refugee camp. But only 400 policemen participated in the mission, which ended in failure after hundreds of civilians and Hamas gunmen blocked their way.
What makes matters even more complicated for Arafat is the fact that the killing took place shortly after 14 people were killed by the IDF in Khan Yunis.
Hamas leaders were quick to vow revenge against Israel. But, with the same breath, they also attacked the PA, accusing its top officials of helping Israel in its efforts to quell the intifada. Their veiled message to the Hamas gunmen is that the PA is also an enemy.

This may clear the way for more Israeli strikes in Gaza.

UPDATE: See James Bennet's piece for the New York Times for more. The "Arab Revolt" in the late 1930s ended in failure and spurred a near civil war of recriminations; it appears the current war started by the Palestinians is following the same pattern.