Two or three years ago, a suicide bomber from Bethlehem attacked Jerusalem. This caused the Israeli government to surround the Bethlehem with walls, to ensure stricter control of movement into the Israel territory (Jerusalem), and to deter any potential suicide bombers.
The walls have since then been covered with graffiti and arts, as forms of freedom of expressions. It is ironic that while the wall gives Bethlehem a reduction in freedom of movement out of the city, it provides a channel for the people living in ‘the Bethlehem prison’ to express themselves freely. I remember reading about the famous British graffiti artist, Banksy, coming down to Bethlehem last year to draw on some parts of the wall, though sadly I could not locate any of his drawings since the walls are too long!
It is also ironic that, given the old Jerusalem was barricaded with wall by the Turkish empire long long time ago, the Israeli government is sort of doing the same to what they experienced long time ago to the Palestines living in Bethlehem. Oh well.