The leaders of the Palestinian Authority firmly condemned the terrorist attack in Jerusalem yesterday. I suggest we believe them. They've got practical reasons for being against such attacks, and who knows, perhaps they've even got glimmers of moral repugnance. Reports in our media have been telling for quite a while now that the cooperation between the PA security forces and ours is reasonably good; when it comes to hitting Hamas cells, it's probably very good.
But it doesn't help. Since immediately after the attack there has been a total gag order on the police investigation, but the hints seeping out - and past experience - suggest the Israeli police, and the General Security Service, and the relevant parts of the IDF, are all intensely focused on trying to figure out who planned the attack, who prepared it, who carried it out, and what else are they planning. This activity is happening wherever it needs to be happening, and past experience indicates that it's likely to be successful, hopefully before the next attack.
Now assume for a moment that Jerusalem has been divided in a peace treaty, and there's a Palestinian government which is truly against terrorist attacks in the Israeli parts of Jerusalem, but they aren't effective enough to stop all attacks. This means there will be attacks, and in their aftermath the Israeli forces will be able to respond only up to the line, not on its other side - even knowing full well that on the other side, that's where the planners are: two blocks over the line, or perhaps in the window overlooking the line, how can anyone know.
Would you be willing to live in such a town? Raise your children there, perhaps?
The fairy tale about a divided but open city is, at best, a fairy tale. More likely it will be a nightmare.
So there will have to be a wall. Right through one of the world's most sensitive and important cities. Even then some attacks will be inevitable, but the police will be forbidden to investigate beyond the wall - which is, I remind you, in the middle of the city.
For the life of me I can't say why people think this will be a good idea.