This sort of thing makes me furious

Yesterday was a bad day for the world: 12 Nepalese hostages were executed in Iraq, 9 Russians died in a bombing in Moscow, and 16 Israeli civilians were slaughtered in a double suicide-bus bombing in Beer Sheva, the first such attack in 6 months. Today is not better: hundreds of children are being held hostage in a Russian school.

Now, this was enough to completely ruin any vestige of enjoyment I've had out of this week. However, some things go above and beyond. An article in the Jerusalem Post caught my eye, and managed to boil my blood:

Ahmed Kawasmeh, one of the two suicide bombers who carried out Tuesday's attacks in Beersheba, was released recently from a Palestinian Authority prison, The Jerusalem Post has learned.

Sources in Hebron said Kawasmeh, 22, was arrested several months ago by the PA security forces in the city on charges of membership in Hamas and planning attacks against Israel.

They said Kawasmeh was held for several weeks before he was released. It's not clear why he was released or if he had been questioned about his plan to carry out a suicide attack.

A PA security source said he was not surprised when he learned that Qawassmeh was one of the suicide bombers. "He was well-known as an enthusiastic member of Hamas and he apparently talked to friends about his desire to kill Jews," he said.

*seethes*

Now, I understand that the PA has been severely curtailed in recent years by Israeli actions. I even will go so far as to say that we cannot currently expect them to identify and arrest every would-be terrorist without a great deal of Israeli help. Yet this goes beyond infuriating - they knew he was a terrorist, they even had arrested him (so clearly they could get ahold of him)... yet they let him go. The Palestinian "justice" system seems to have a built in revolving door.