Speculation of a potential cease fire in Gaza took a major blow with news of a terrorist bombing a bus in Tel Aviv, Israel. Even worse was the response from Hamas:
Hamas spokesman Sami Abu Zuhri praised the bombing, but stopped short of claiming responsibility. "Hamas blesses the attack in Tel Aviv and sees it as a natural response to the Israeli massacres... in Gaza," he told Reuters.
Endorsing terrorist strikes on civilian populations is not something civilized (or even vaguely modern) organizations do. Then again, this isn't exactly groundbreaking stuff for Hamas.
To make things even worse, Fatah's military wing has claimed responsibility for the attack.