What do you see from the rooftop of a refugee centre in Bethlehem? You see an amazing graffiti display, inspired and led by Banksy’s own art, to the right. To the left, you see a playground and astroturf pitches full of children and highly politicised agitprop art – there are kids and the sound of them everywhere. And in front, you see an impressively enormous entrance to Aida refugee camp, its archway topped with a huge old-fashioned key to symbolise the right of return for these refugees, to the homes their parents or grandparents were driven out of.