So Israel unilaterally withdraws from Gaza, displacing its own citizens, digging up graves, abandoning entire towns. The Palestinians move in. They hold a celebration. And as in all Palestinian "celebrations," something explodes.

The escalation was set off by an explosion Friday at a Hamas rally in the crowded Jebaliya refugee camp that killed at least 15 Palestinians. Witnesses said the blast went off near a pickup truck carryin Hamas militants and homemade rockets.
[...]

(T)he Palestinian Authority described the explosion as an accident that happened when Islamic militants mishandled explosives.

So there you have it. The Palestinians accidently blew up themselves. And they admit it. Then we discover why peace in the middle east depends more upon the Palestinians then upon the Israelis.

Hamas blamed Israel and said it fired rockets on Israeli border towns in retaliation.

Until the Palestinians get a leash on the barbarous thugs in their midst, they have nobody to blame but themselves.