The Great Wall of China was an effective barrier against Mongol invasion as long as the society that erected it had the will to keep it in good repair and deploy sufficient troops along it's length.
No reason why the same should not apply to the Israeli Wall.
Yes, but as the article indicates, the "wall" sends out one message while the "cage" sends out another.
The "Cage" puts the onus on the Palestinians, not the Israelis.
The Cage.
An idea whose time has come.